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246 lines
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246 lines
14 KiB
Plaintext
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GNU GENERAL PUBLIC LICENSE
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Version 2, June 1991
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Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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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 licenses for most software are designed to take away your freedom to share and
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change it. By contrast, the GNU General Public License is intended to guarantee your
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freedom to share and change free software--to make sure the software is free for all
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its users. This General Public License applies to most of the Free Software
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Foundation's software and to any other program whose authors commit to using it.
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(Some other Free Software Foundation software is covered by the GNU Lesser General
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Public License instead.) You can apply it to your programs, too.
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When we speak of free software, we are referring to freedom, not price. Our General
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Public Licenses are designed to make sure that you have the freedom to distribute
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copies of free software (and charge for this service if you wish), that you receive
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source code or can get it if you want it, that you can change the software or use
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pieces of it in new free programs; and that you know you can do these things.
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To protect your rights, we need to make restrictions that forbid anyone to deny you
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these rights or to ask you to surrender the rights. These restrictions translate to
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certain responsibilities for you if you distribute copies of the software, or if you
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modify it.
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For example, if you distribute copies of such a program, whether gratis or for a
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fee, you must give the recipients all the rights that you have. You must make sure
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that they, too, receive or can get the source code. And you must show them these
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terms so they know their rights.
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We protect your rights with two steps: (1) copyright the software, and (2) offer you
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this license which gives you legal permission to copy, distribute and/or modify the
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software.
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Also, for each author's protection and ours, we want to make certain that everyone
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understands that there is no warranty for this free software. If the software is
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modified by someone else and passed on, we want its recipients to know that what
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they have is not the original, so that any problems introduced by others will not
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reflect on the original authors' reputations.
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Finally, any free program is threatened constantly by software patents. We wish to
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avoid the danger that redistributors of a free program will individually obtain
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patent licenses, in effect making the program proprietary. To prevent this, we have
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made it clear that any patent must be licensed for everyone's free use or not
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licensed at all.
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The precise terms and conditions for copying, distribution and modification follow.
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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0. This License applies to any program or other work which contains a notice placed
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by the copyright holder saying it may be distributed under the terms of this General
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Public License. The "Program", below, refers to any such program or work, and a
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"work based on the Program" means either the Program or any derivative work under
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copyright law: that is to say, a work containing the Program or a portion of it,
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either verbatim or with modifications and/or translated into another language.
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(Hereinafter, translation is included without limitation in the term
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"modification".) Each licensee is addressed as "you".
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Activities other than copying, distribution and modification are not covered by this
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License; they are outside its scope. The act of running the Program is not
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restricted, and the output from the Program is covered only if its contents
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constitute a work based on the Program (independent of having been made by running
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the Program). Whether that is true depends on what the Program does.
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1. You may copy and distribute verbatim copies of the Program's source code as you
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receive it, in any medium, provided that you conspicuously and appropriately publish
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on each copy an appropriate copyright notice and disclaimer of warranty; keep intact
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all the notices that refer to this License and to the absence of any warranty; and
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give any other recipients of the Program a copy of this License along with the
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Program.
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You may charge a fee for the physical act of transferring a copy, and you may at
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your option offer warranty protection in exchange for a fee.
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2. You may modify your copy or copies of the Program or any portion of it, thus
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forming a work based on the Program, and copy and distribute such modifications or
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work under the terms of Section 1 above, provided that you also meet all of these
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conditions:
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a) You must cause the modified files to carry prominent notices stating that you
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changed the files and the date of any change.
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b) You must cause any work that you distribute or publish, that in whole or in
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part contains or is derived from the Program or any part thereof, to be licensed
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as a whole at no charge to all third parties under the terms of this License.
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c) If the modified program normally reads commands interactively when run, you
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must cause it, when started running for such interactive use in the most
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ordinary way, to print or display an announcement including an appropriate
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copyright notice and a notice that there is no warranty (or else, saying that
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you provide a warranty) and that users may redistribute the program under these
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conditions, and telling the user how to view a copy of this License. (Exception:
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if the Program itself is interactive but does not normally print such an
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announcement, your work based on the Program is not required to print an
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announcement.)
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These requirements apply to the modified work as a whole. If identifiable sections
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of that work are not derived from the Program, and can be reasonably considered
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independent and separate works in themselves, then this License, and its terms, do
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not apply to those sections when you distribute them as separate works. But when you
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distribute the same sections as part of a whole which is a work based on the
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Program, the distribution of the whole must be on the terms of this License, whose
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permissions for other licensees extend to the entire whole, and thus to each and
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every part regardless of who wrote it.
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Thus, it is not the intent of this section to claim rights or contest your rights to
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work written entirely by you; rather, the intent is to exercise the right to control
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the distribution of derivative or collective works based on the Program.
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In addition, mere aggregation of another work not based on the Program with the
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Program (or with a work based on the Program) on a volume of a storage or
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distribution medium does not bring the other work under the scope of this License.
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3. You may copy and distribute the Program (or a work based on it, under Section 2)
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in object code or executable form under the terms of Sections 1 and 2 above provided
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that you also do one of the following:
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a) Accompany it with the complete corresponding machine-readable source code,
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which must be distributed under the terms of Sections 1 and 2 above on a medium
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customarily used for software interchange; or,
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b) Accompany it with a written offer, valid for at least three years, to give
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any third party, for a charge no more than your cost of physically performing
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source distribution, a complete machine-readable copy of the corresponding
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source code, to be distributed under the terms of Sections 1 and 2 above on a
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medium customarily used for software interchange; or,
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c) Accompany it with the information you received as to the offer to distribute
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corresponding source code. (This alternative is allowed only for noncommercial
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distribution and only if you received the program in object code or executable
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form with such an offer, in accord with Subsection b above.)
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The source code for a work means the preferred form of the work for making
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modifications to it. For an executable work, complete source code means all the
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source code for all modules it contains, plus any associated interface definition
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files, plus the scripts used to control compilation and installation of the
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executable. However, as a special exception, the source code distributed need not
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include anything that is normally distributed (in either source or binary form) with
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the major components (compiler, kernel, and so on) of the operating system on which
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the executable runs, unless that component itself accompanies the executable.
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If distribution of executable or object code is made by offering access to copy from
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a designated place, then offering equivalent access to copy the source code from the
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same place counts as distribution of the source code, even though third parties are
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not compelled to copy the source along with the object code.
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4. You may not copy, modify, sublicense, or distribute the Program except as
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expressly provided under this License. Any attempt otherwise to copy, modify,
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sublicense or distribute the Program is void, and will automatically terminate your
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rights under this License. However, parties who have received copies, or rights,
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from you under this License will not have their licenses terminated so long as such
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parties remain in full compliance.
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5. You are not required to accept this License, since you have not signed it.
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However, nothing else grants you permission to modify or distribute the Program or
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its derivative works. These actions are prohibited by law if you do not accept this
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License. Therefore, by modifying or distributing the Program (or any work based on
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the Program), you indicate your acceptance of this License to do so, and all its
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terms and conditions for copying, distributing or modifying the Program or works
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based on it.
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6. Each time you redistribute the Program (or any work based on the Program), the
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recipient automatically receives a license from the original licensor to copy,
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distribute or modify the Program subject to these terms and conditions. You may not
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impose any further restrictions on the recipients' exercise of the rights granted
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herein. You are not responsible for enforcing compliance by third parties to this
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License.
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7. If, as a consequence of a court judgment or allegation of patent infringement or
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for any other reason (not limited to patent issues), conditions are imposed on you
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(whether by court order, agreement or otherwise) that contradict the conditions of
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this License, they do not excuse you from the conditions of this License. If you
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cannot distribute so as to satisfy simultaneously your obligations under this
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License and any other pertinent obligations, then as a consequence you may not
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distribute the Program at all. For example, if a patent license would not permit
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royalty-free redistribution of the Program by all those who receive copies directly
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or indirectly through you, then the only way you could satisfy both it and this
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License would be to refrain entirely from distribution of the Program.
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If any portion of this section is held invalid or unenforceable under any particular
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circumstance, the balance of the section is intended to apply and the section as a
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whole is intended to apply in other circumstances.
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It is not the purpose of this section to induce you to infringe any patents or other
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property right claims or to contest validity of any such claims; this section has
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the sole purpose of protecting the integrity of the free software distribution
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system, which is implemented by public license practices. Many people have made
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generous contributions to the wide range of software distributed through that system
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in reliance on consistent application of that system; it is up to the author/donor
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to decide if he or she is willing to distribute software through any other system
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and a licensee cannot impose that choice.
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This section is intended to make thoroughly clear what is believed to be a
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consequence of the rest of this License.
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8. If the distribution and/or use of the Program is restricted in certain countries
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either by patents or by copyrighted interfaces, the original copyright holder who
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places the Program under this License may add an explicit geographical distribution
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limitation excluding those countries, so that distribution is permitted only in or
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among countries not thus excluded. In such case, this License incorporates the
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limitation as if written in the body of this License.
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9. The Free Software Foundation may publish revised and/or new versions of the
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General Public License from time to time. Such new versions will be similar in
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spirit to the present version, but may differ in detail to address new problems or
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concerns.
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Each version is given a distinguishing version number. If the Program specifies a
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version number of this License which applies to it and "any later version", you have
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the option of following the terms and conditions either of that version or of any
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later version published by the Free Software Foundation. If the Program does not
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specify a version number of this License, you may choose any version ever published
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by the Free Software Foundation.
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10. If you wish to incorporate parts of the Program into other free programs whose
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distribution conditions are different, write to the author to ask for permission.
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For software which is copyrighted by the Free Software Foundation, write to the Free
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Software Foundation; we sometimes make exceptions for this. Our decision will be
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guided by the two goals of preserving the free status of all derivatives of our free
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software and of promoting the sharing and reuse of software generally.
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NO WARRANTY
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11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE
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PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN
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WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
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WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH
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YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY
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SERVICING, REPAIR OR CORRECTION.
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12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
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COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM
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AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
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INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
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PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE
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OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE
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WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGES.
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