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                    GNU GENERAL PUBLIC LICENSE
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                       Version 3, 29 June 2007
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 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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 Everyone is permitted to copy and distribute verbatim copies
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 of this license document, but changing it is not allowed.
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                            Preamble
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  The GNU General Public License is a free, copyleft license for
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software and other kinds of works.
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  The licenses for most software and other practical works are designed
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to take away your freedom to share and change the works.  By contrast,
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the GNU General Public License is intended to guarantee your freedom to
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share and change all versions of a program--to make sure it remains free
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software for all its users.  We, the Free Software Foundation, use the
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GNU General Public License for most of our software; it applies also to
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any other work released this way by its authors.  You can apply it to
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your programs, too.
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  When we speak of free software, we are referring to freedom, not
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price.  Our General Public Licenses are designed to make sure that you
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have the freedom to distribute copies of free software (and charge for
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them if you wish), that you receive source code or can get it if you
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want it, that you can change the software or use pieces of it in new
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free programs, and that you know you can do these things.
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  To protect your rights, we need to prevent others from denying you
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these rights or asking you to surrender the rights.  Therefore, you have
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certain responsibilities if you distribute copies of the software, or if
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you modify it: responsibilities to respect the freedom of others.
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  For example, if you distribute copies of such a program, whether
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gratis or for a fee, you must pass on to the recipients the same
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freedoms that you received.  You must make sure that they, too, receive
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or can get the source code.  And you must show them these terms so they
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know their rights.
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  Developers that use the GNU GPL protect your rights with two steps:
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(1) assert copyright on the software, and (2) offer you this License
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giving you legal permission to copy, distribute and/or modify it.
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  For the developers' and authors' protection, the GPL clearly explains
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that there is no warranty for this free software.  For both users' and
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authors' sake, the GPL requires that modified versions be marked as
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changed, so that their problems will not be attributed erroneously to
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authors of previous versions.
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  Some devices are designed to deny users access to install or run
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modified versions of the software inside them, although the manufacturer
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can do so.  This is fundamentally incompatible with the aim of
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protecting users' freedom to change the software.  The systematic
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pattern of such abuse occurs in the area of products for individuals to
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use, which is precisely where it is most unacceptable.  Therefore, we
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have designed this version of the GPL to prohibit the practice for those
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products.  If such problems arise substantially in other domains, we
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stand ready to extend this provision to those domains in future versions
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of the GPL, as needed to protect the freedom of users.
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  Finally, every program is threatened constantly by software patents.
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States should not allow patents to restrict development and use of
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software on general-purpose computers, but in those that do, we wish to
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avoid the special danger that patents applied to a free program could
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make it effectively proprietary.  To prevent this, the GPL assures that
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patents cannot be used to render the program non-free.
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  The precise terms and conditions for copying, distribution and
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modification follow.
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                       TERMS AND CONDITIONS
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  0. Definitions.
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  "This License" refers to version 3 of the GNU General Public License.
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  "Copyright" also means copyright-like laws that apply to other kinds of
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works, such as semiconductor masks.
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  "The Program" refers to any copyrightable work licensed under this
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License.  Each licensee is addressed as "you".  "Licensees" and
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"recipients" may be individuals or organizations.
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  To "modify" a work means to copy from or adapt all or part of the work
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in a fashion requiring copyright permission, other than the making of an
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exact copy.  The resulting work is called a "modified version" of the
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earlier work or a work "based on" the earlier work.
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  A "covered work" means either the unmodified Program or a work based
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on the Program.
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  To "propagate" a work means to do anything with it that, without
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permission, would make you directly or secondarily liable for
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infringement under applicable copyright law, except executing it on a
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computer or modifying a private copy.  Propagation includes copying,
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distribution (with or without modification), making available to the
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public, and in some countries other activities as well.
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  To "convey" a work means any kind of propagation that enables other
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parties to make or receive copies.  Mere interaction with a user through
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a computer network, with no transfer of a copy, is not conveying.
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  An interactive user interface displays "Appropriate Legal Notices"
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to the extent that it includes a convenient and prominently visible
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feature that (1) displays an appropriate copyright notice, and (2)
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tells the user that there is no warranty for the work (except to the
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extent that warranties are provided), that licensees may convey the
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menu, a prominent item in the list meets this criterion.
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  1. Source Code.
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for making modifications to it.  "Object code" means any non-source
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is widely used among developers working in that language.
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than the work as a whole, that (a) is included in the normal form of
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packaging a Major Component, but which is not part of that Major
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  The Corresponding Source for a work in source code form is that
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same work.
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  2. Basic Permissions.
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  All rights granted under this License are granted for the term of
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copyright on the Program, and are irrevocable provided the stated
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conditions are met.  This License explicitly affirms your unlimited
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permission to run the unmodified Program.  The output from running a
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covered work is covered by this License only if the output, given its
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content, constitutes a covered work.  This License acknowledges your
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rights of fair use or other equivalent, as provided by copyright law.
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  You may make, run and propagate covered works that you do not
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convey, without conditions so long as your license otherwise remains
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in force.  You may convey covered works to others for the sole purpose
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of having them make modifications exclusively for you, or provide you
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with facilities for running those works, provided that you comply with
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the terms of this License in conveying all material for which you do
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not control copyright.  Those thus making or running the covered works
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for you must do so exclusively on your behalf, under your direction
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and control, on terms that prohibit them from making any copies of
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your copyrighted material outside their relationship with you.
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  Conveying under any other circumstances is permitted solely under
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  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
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  No covered work shall be deemed part of an effective technological
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11 of the WIPO copyright treaty adopted on 20 December 1996, or
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similar laws prohibiting or restricting circumvention of such
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measures.
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  When you convey a covered work, you waive any legal power to forbid
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is effected by exercising rights under this License with respect to
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the covered work, and you disclaim any intention to limit operation or
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modification of the work as a means of enforcing, against the work's
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users, your or third parties' legal rights to forbid circumvention of
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  You may convey verbatim copies of the Program's source code as you
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receive it, in any medium, provided that you conspicuously and
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appropriately publish on each copy an appropriate copyright notice;
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keep intact all notices stating that this License and any
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non-permissive terms added in accord with section 7 apply to the code;
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keep intact all notices of the absence of any warranty; and give all
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recipients a copy of this License along with the Program.
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  You may charge any price or no price for each copy that you convey,
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and you may offer support or warranty protection for a fee.
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  You may convey a work based on the Program, or the modifications to
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produce it from the Program, in the form of source code under the
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    a) The work must carry prominent notices stating that you modified
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    it, and giving a relevant date.
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    b) The work must carry prominent notices stating that it is
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    released under this License and any conditions added under section
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    c) You must license the entire work, as a whole, under this
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    License to anyone who comes into possession of a copy.  This
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    License will therefore apply, along with any applicable section 7
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    additional terms, to the whole of the work, and all its parts,
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    regardless of how they are packaged.  This License gives no
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    invalidate such permission if you have separately received it.
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    d) If the work has interactive user interfaces, each must display
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  A compilation of a covered work with other separate and independent
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works, which are not by their nature extensions of the covered work,
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and which are not combined with it such as to form a larger program,
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in or on a volume of a storage or distribution medium, is called an
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"aggregate" if the compilation and its resulting copyright are not
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used to limit the access or legal rights of the compilation's users
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beyond what the individual works permit.  Inclusion of a covered work
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in an aggregate does not cause this License to apply to the other
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parts of the aggregate.
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  6. Conveying Non-Source Forms.
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  You may convey a covered work in object code form under the terms
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of sections 4 and 5, provided that you also convey the
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machine-readable Corresponding Source under the terms of this License,
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in one of these ways:
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    a) Convey the object code in, or embodied in, a physical product
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    (including a physical distribution medium), accompanied by the
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    Corresponding Source fixed on a durable physical medium
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    customarily used for software interchange.
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    b) Convey the object code in, or embodied in, a physical product
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    (including a physical distribution medium), accompanied by a
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    written offer, valid for at least three years and valid for as
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    long as you offer spare parts or customer support for that product
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    model, to give anyone who possesses the object code either (1) a
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    copy of the Corresponding Source for all the software in the
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    product that is covered by this License, on a durable physical
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    medium customarily used for software interchange, for a price no
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    more than your reasonable cost of physically performing this
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    conveying of source, or (2) access to copy the
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    Corresponding Source from a network server at no charge.
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    c) Convey individual copies of the object code with a copy of the
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    alternative is allowed only occasionally and noncommercially, and
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    only if you received the object code with such an offer, in accord
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    with subsection 6b.
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    d) Convey the object code by offering access from a designated
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    e) Convey the object code using peer-to-peer transmission, provided
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  A separable portion of the object code, whose source code is excluded
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from the Corresponding Source as a System Library, need not be
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Corresponding Source conveyed under this section must be accompanied
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by the Installation Information.  But this requirement does not apply
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if neither you nor any third party retains the ability to install
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modified object code on the User Product (for example, the work has
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been installed in ROM).
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requirement to continue to provide support service, warranty, or updates
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for a work that has been modified or installed by the recipient, or for
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the User Product in which it has been modified or installed.  Access to a
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network may be denied when the modification itself materially and
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adversely affects the operation of the network or violates the rules and
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protocols for communication across the network.
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  Corresponding Source conveyed, and Installation Information provided,
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in accord with this section must be in a format that is publicly
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documented (and with an implementation available to the public in
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source code form), and must require no special password or key for
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unpacking, reading or copying.
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  7. Additional Terms.
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  "Additional permissions" are terms that supplement the terms of this
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License by making exceptions from one or more of its conditions.
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Additional permissions that are applicable to the entire Program shall
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be treated as though they were included in this License, to the extent
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that they are valid under applicable law.  If additional permissions
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apply only to part of the Program, that part may be used separately
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under those permissions, but the entire Program remains governed by
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this License without regard to the additional permissions.
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  When you convey a copy of a covered work, you may at your option
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remove any additional permissions from that copy, or from any part of
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it.  (Additional permissions may be written to require their own
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removal in certain cases when you modify the work.)  You may place
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additional permissions on material, added by you to a covered work,
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for which you have or can give appropriate copyright permission.
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  Notwithstanding any other provision of this License, for material you
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add to a covered work, you may (if authorized by the copyright holders of
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that material) supplement the terms of this License with terms:
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    a) Disclaiming warranty or limiting liability differently from the
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    terms of sections 15 and 16 of this License; or
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    b) Requiring preservation of specified reasonable legal notices or
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    author attributions in that material or in the Appropriate Legal
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    Notices displayed by works containing it; or
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    c) Prohibiting misrepresentation of the origin of that material, or
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    reasonable ways as different from the original version; or
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    d) Limiting the use for publicity purposes of names of licensors or
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    authors of the material; or
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    e) Declining to grant rights under trademark law for use of some
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    trade names, trademarks, or service marks; or
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    f) Requiring indemnification of licensors and authors of that
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    material by anyone who conveys the material (or modified versions of
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    it) with contractual assumptions of liability to the recipient, for
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    any liability that these contractual assumptions directly impose on
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    those licensors and authors.
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  All other non-permissive additional terms are considered "further
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restrictions" within the meaning of section 10.  If the Program as you
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received it, or any part of it, contains a notice stating that it is
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governed by this License along with a term that is a further
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restriction, you may remove that term.  If a license document contains
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a further restriction but permits relicensing or conveying under this
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License, you may add to a covered work material governed by the terms
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not survive such relicensing or conveying.
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  Additional terms, permissive or non-permissive, may be stated in the
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form of a separately written license, or stated as exceptions;
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the above requirements apply either way.
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  8. Termination.
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409
  You may not propagate or modify a covered work except as expressly
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provided under this License.  Any attempt otherwise to propagate or
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modify it is void, and will automatically terminate your rights under
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this License (including any patent licenses granted under the third
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paragraph of section 11).
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  However, if you cease all violation of this License, then your
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license from a particular copyright holder is reinstated (a)
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provisionally, unless and until the copyright holder explicitly and
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finally terminates your license, and (b) permanently, if the copyright
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holder fails to notify you of the violation by some reasonable means
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prior to 60 days after the cessation.
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  Moreover, your license from a particular copyright holder is
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reinstated permanently if the copyright holder notifies you of the
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violation by some reasonable means, this is the first time you have
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received notice of violation of this License (for any work) from that
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copyright holder, and you cure the violation prior to 30 days after
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your receipt of the notice.
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  Termination of your rights under this section does not terminate the
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licenses of parties who have received copies or rights from you under
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this License.  If your rights have been terminated and not permanently
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reinstated, you do not qualify to receive new licenses for the same
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material under section 10.
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  9. Acceptance Not Required for Having Copies.
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  You are not required to accept this License in order to receive or
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run a copy of the Program.  Ancillary propagation of a covered work
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occurring solely as a consequence of using peer-to-peer transmission
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to receive a copy likewise does not require acceptance.  However,
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nothing other than this License grants you permission to propagate or
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modify any covered work.  These actions infringe copyright if you do
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not accept this License.  Therefore, by modifying or propagating a
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covered work, you indicate your acceptance of this License to do so.
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  10. Automatic Licensing of Downstream Recipients.
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448
  Each time you convey a covered work, the recipient automatically
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receives a license from the original licensors, to run, modify and
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propagate that work, subject to this License.  You are not responsible
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for enforcing compliance by third parties with this License.
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  An "entity transaction" is a transaction transferring control of an
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organization, or substantially all assets of one, or subdividing an
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licenses to the work the party's predecessor in interest had or could
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give under the previous paragraph, plus a right to possession of the
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Corresponding Source of the work from the predecessor in interest, if
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the predecessor has it or can get it with reasonable efforts.
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463
  You may not impose any further restrictions on the exercise of the
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rights granted or affirmed under this License.  For example, you may
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rights granted under this License, and you may not initiate litigation
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(including a cross-claim or counterclaim in a lawsuit) alleging that
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any patent claim is infringed by making, using, selling, offering for
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sale, or importing the Program or any portion of it.
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471
  11. Patents.
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473
  A "contributor" is a copyright holder who authorizes use under this
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License of the Program or a work on which the Program is based.  The
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work thus licensed is called the contributor's "contributor version".
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477
  A contributor's "essential patent claims" are all patent claims
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owned or controlled by the contributor, whether already acquired or
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hereafter acquired, that would be infringed by some manner, permitted
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by this License, of making, using, or selling its contributor version,
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but do not include claims that would be infringed only as a
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consequence of further modification of the contributor version.  For
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purposes of this definition, "control" includes the right to grant
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patent sublicenses in a manner consistent with the requirements of
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this License.
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487
  Each contributor grants you a non-exclusive, worldwide, royalty-free
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patent license under the contributor's essential patent claims, to
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make, use, sell, offer for sale, import and otherwise run, modify and
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propagate the contents of its contributor version.
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492
  In the following three paragraphs, a "patent license" is any express
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agreement or commitment, however denominated, not to enforce a patent
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(such as an express permission to practice a patent or covenant not to
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sue for patent infringement).  To "grant" such a patent license to a
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party means to make such an agreement or commitment not to enforce a
497
patent against the party.
498

    
499
  If you convey a covered work, knowingly relying on a patent license,
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and the Corresponding Source of the work is not available for anyone
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to copy, free of charge and under the terms of this License, through a
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publicly available network server or other readily accessible means,
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then you must either (1) cause the Corresponding Source to be so
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available, or (2) arrange to deprive yourself of the benefit of the
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patent license for this particular work, or (3) arrange, in a manner
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consistent with the requirements of this License, to extend the patent
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license to downstream recipients.  "Knowingly relying" means you have
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actual knowledge that, but for the patent license, your conveying the
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covered work in a country, or your recipient's use of the covered work
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in a country, would infringe one or more identifiable patents in that
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country that you have reason to believe are valid.
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513
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or convey a specific copy of the covered work, then the patent license
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you grant is automatically extended to all recipients of the covered
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work and works based on it.
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521
  A patent license is "discriminatory" if it does not include within
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the scope of its coverage, prohibits the exercise of, or is
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conditioned on the non-exercise of one or more of the rights that are
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specifically granted under this License.  You may not convey a covered
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work if you are a party to an arrangement with a third party that is
526
in the business of distributing software, under which you make payment
527
to the third party based on the extent of your activity of conveying
528
the work, and under which the third party grants, to any of the
529
parties who would receive the covered work from you, a discriminatory
530
patent license (a) in connection with copies of the covered work
531
conveyed by you (or copies made from those copies), or (b) primarily
532
for and in connection with specific products or compilations that
533
contain the covered work, unless you entered into that arrangement,
534
or that patent license was granted, prior to 28 March 2007.
535

    
536
  Nothing in this License shall be construed as excluding or limiting
537
any implied license or other defenses to infringement that may
538
otherwise be available to you under applicable patent law.
539

    
540
  12. No Surrender of Others' Freedom.
541

    
542
  If conditions are imposed on you (whether by court order, agreement or
543
otherwise) that contradict the conditions of this License, they do not
544
excuse you from the conditions of this License.  If you cannot convey a
545
covered work so as to satisfy simultaneously your obligations under this
546
License and any other pertinent obligations, then as a consequence you may
547
not convey it at all.  For example, if you agree to terms that obligate you
548
to collect a royalty for further conveying from those to whom you convey
549
the Program, the only way you could satisfy both those terms and this
550
License would be to refrain entirely from conveying the Program.
551

    
552
  13. Use with the GNU Affero General Public License.
553

    
554
  Notwithstanding any other provision of this License, you have
555
permission to link or combine any covered work with a work licensed
556
under version 3 of the GNU Affero General Public License into a single
557
combined work, and to convey the resulting work.  The terms of this
558
License will continue to apply to the part which is the covered work,
559
but the special requirements of the GNU Affero General Public License,
560
section 13, concerning interaction through a network will apply to the
561
combination as such.
562

    
563
  14. Revised Versions of this License.
564

    
565
  The Free Software Foundation may publish revised and/or new versions of
566
the GNU General Public License from time to time.  Such new versions will
567
be similar in spirit to the present version, but may differ in detail to
568
address new problems or concerns.
569

    
570
  Each version is given a distinguishing version number.  If the
571
Program specifies that a certain numbered version of the GNU General
572
Public License "or any later version" applies to it, you have the
573
option of following the terms and conditions either of that numbered
574
version or of any later version published by the Free Software
575
Foundation.  If the Program does not specify a version number of the
576
GNU General Public License, you may choose any version ever published
577
by the Free Software Foundation.
578

    
579
  If the Program specifies that a proxy can decide which future
580
versions of the GNU General Public License can be used, that proxy's
581
public statement of acceptance of a version permanently authorizes you
582
to choose that version for the Program.
583

    
584
  Later license versions may give you additional or different
585
permissions.  However, no additional obligations are imposed on any
586
author or copyright holder as a result of your choosing to follow a
587
later version.
588

    
589
  15. Disclaimer of Warranty.
590

    
591
  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592
APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596
PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597
IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599

    
600
  16. Limitation of Liability.
601

    
602
  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610
SUCH DAMAGES.
611

    
612
  17. Interpretation of Sections 15 and 16.
613

    
614
  If the disclaimer of warranty and limitation of liability provided
615
above cannot be given local legal effect according to their terms,
616
reviewing courts shall apply local law that most closely approximates
617
an absolute waiver of all civil liability in connection with the
618
Program, unless a warranty or assumption of liability accompanies a
619
copy of the Program in return for a fee.
620

    
621
                     END OF TERMS AND CONDITIONS
622

    
623
            How to Apply These Terms to Your New Programs
624

    
625
  If you develop a new program, and you want it to be of the greatest
626
possible use to the public, the best way to achieve this is to make it
627
free software which everyone can redistribute and change under these terms.
628

    
629
  To do so, attach the following notices to the program.  It is safest
630
to attach them to the start of each source file to most effectively
631
state the exclusion of warranty; and each file should have at least
632
the "copyright" line and a pointer to where the full notice is found.
633

    
634
    <one line to give the program's name and a brief idea of what it does.>
635
    Copyright (C) <year>  <name of author>
636

    
637
    This program is free software: you can redistribute it and/or modify
638
    it under the terms of the GNU General Public License as published by
639
    the Free Software Foundation, either version 3 of the License, or
640
    (at your option) any later version.
641

    
642
    This program is distributed in the hope that it will be useful,
643
    but WITHOUT ANY WARRANTY; without even the implied warranty of
644
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
645
    GNU General Public License for more details.
646

    
647
    You should have received a copy of the GNU General Public License
648
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
649

    
650
Also add information on how to contact you by electronic and paper mail.
651

    
652
  If the program does terminal interaction, make it output a short
653
notice like this when it starts in an interactive mode:
654

    
655
    <program>  Copyright (C) <year>  <name of author>
656
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657
    This is free software, and you are welcome to redistribute it
658
    under certain conditions; type `show c' for details.
659

    
660
The hypothetical commands `show w' and `show c' should show the appropriate
661
parts of the General Public License.  Of course, your program's commands
662
might be different; for a GUI interface, you would use an "about box".
663

    
664
  You should also get your employer (if you work as a programmer) or school,
665
if any, to sign a "copyright disclaimer" for the program, if necessary.
666
For more information on this, and how to apply and follow the GNU GPL, see
667
<http://www.gnu.org/licenses/>.
668

    
669
  The GNU General Public License does not permit incorporating your program
670
into proprietary programs.  If your program is a subroutine library, you
671
may consider it more useful to permit linking proprietary applications with
672
the library.  If this is what you want to do, use the GNU Lesser General
673
Public License instead of this License.  But first, please read
674
<http://www.gnu.org/philosophy/why-not-lgpl.html>.