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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. <https://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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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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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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know their rights.
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Developers that use the GNU GPL protect your rights with two steps:
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Finally, every program is threatened constantly by software patents.
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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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infringement under applicable copyright law, except executing it on a
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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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You may make, run and propagate covered works that you do not
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Conveying under any other circumstances is permitted solely under
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No covered work shall be deemed part of an effective technological
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similar laws prohibiting or restricting circumvention of such
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4. Conveying Verbatim Copies.
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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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You may charge any price or no price for each copy that you convey,
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produce it from the Program, in the form of source code under the
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terms of section 4, provided that you also meet all of these conditions:
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a) The work must carry prominent notices stating that you modified
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b) The work must carry prominent notices stating that it is
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7. This requirement modifies the requirement in section 4 to
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"keep intact all notices".
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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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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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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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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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a) Convey the object code in, or embodied in, a physical product
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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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long as you offer spare parts or customer support for that product
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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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c) Convey individual copies of the object code with a copy of the
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written offer to provide the Corresponding Source. This
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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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from the Corresponding Source as a System Library, need not be
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A "User Product" is either (1) a "consumer product", which means any
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"Installation Information" for a User Product means any methods,
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code is in no case prevented or interfered with solely because
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If you convey an object code work under this section in, or with, or
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Corresponding Source conveyed, and Installation Information provided,
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source code form), and must require no special password or key for
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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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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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Notwithstanding any other provision of this License, for material you
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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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If you add terms to a covered work in accord with this section, you
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the above requirements apply either way.
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8. Termination.
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You may not propagate or modify a covered work except as expressly
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However, if you cease all violation of this License, then your
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Termination of your rights under this section does not terminate the
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reinstated, you do not qualify to receive new licenses for the same
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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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10. Automatic Licensing of Downstream Recipients.
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Each time you convey a covered work, the recipient automatically
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propagate that work, subject to this License. You are not responsible
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An "entity transaction" is a transaction transferring control of an
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You may not impose any further restrictions on the exercise of the
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any patent claim is infringed by making, using, selling, offering for
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11. Patents.
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A "contributor" is a copyright holder who authorizes use under this
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A contributor's "essential patent claims" are all patent claims
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In the following three paragraphs, a "patent license" is any express
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If you convey a covered work, knowingly relying on a patent license,
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then you must either (1) cause the Corresponding Source to be so
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If, pursuant to or in connection with a single transaction or
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A patent license is "discriminatory" if it does not include within
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or that patent license was granted, prior to 28 March 2007.
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Nothing in this License shall be construed as excluding or limiting
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any implied license or other defenses to infringement that may
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otherwise be available to you under applicable patent law.
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12. No Surrender of Others' Freedom.
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If conditions are imposed on you (whether by court order, agreement or
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the Program, the only way you could satisfy both those terms and this
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13. Use with the GNU Affero General Public License.
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Notwithstanding any other provision of this License, you have
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but the special requirements of the GNU Affero General Public License,
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section 13, concerning interaction through a network will apply to the
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combination as such.
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14. Revised Versions of this License.
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The Free Software Foundation may publish revised and/or new versions of
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be similar in spirit to the present version, but may differ in detail to
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address new problems or concerns.
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Each version is given a distinguishing version number. If the
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version or of any later version published by the Free Software
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Foundation. If the Program does not specify a version number of the
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GNU General Public License, you may choose any version ever published
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by the Free Software Foundation.
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If the Program specifies that a proxy can decide which future
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versions of the GNU General Public License can be used, that proxy's
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public statement of acceptance of a version permanently authorizes you
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to choose that version for the Program.
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Later license versions may give you additional or different
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permissions. However, no additional obligations are imposed on any
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author or copyright holder as a result of your choosing to follow a
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later version.
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15. Disclaimer of Warranty.
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THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
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HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
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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
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IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
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ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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16. Limitation of Liability.
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
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THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
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GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
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USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
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DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
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PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
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EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGES.
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17. Interpretation of Sections 15 and 16.
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If the disclaimer of warranty and limitation of liability provided
615
above cannot be given local legal effect according to their terms,
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reviewing courts shall apply local law that most closely approximates
617
an absolute waiver of all civil liability in connection with the
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Program, unless a warranty or assumption of liability accompanies a
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copy of the Program in return for a fee.
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END OF TERMS AND CONDITIONS
622
How to Apply These Terms to Your New Programs
624
If you develop a new program, and you want it to be of the greatest
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possible use to the public, the best way to achieve this is to make it
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free software which everyone can redistribute and change under these terms.
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To do so, attach the following notices to the program. It is safest
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to attach them to the start of each source file to most effectively
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state the exclusion of warranty; and each file should have at least
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the "copyright" line and a pointer to where the full notice is found.
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<one line to give the program's name and a brief idea of what it does.>
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Copyright (C) <year> <name of author>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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Also add information on how to contact you by electronic and paper mail.
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If the program does terminal interaction, make it output a short
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notice like this when it starts in an interactive mode:
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<program> Copyright (C) <year> <name of author>
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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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This is free software, and you are welcome to redistribute it
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under certain conditions; type `show c' for details.
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The hypothetical commands `show w' and `show c' should show the appropriate
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parts of the General Public License. Of course, your program's commands
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might be different; for a GUI interface, you would use an "about box".
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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.
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For more information on this, and how to apply and follow the GNU GPL, see
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<https://www.gnu.org/licenses/>.
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The GNU General Public License does not permit incorporating your program
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into proprietary programs. If your program is a subroutine library, you
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may consider it more useful to permit linking proprietary applications with
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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
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<https://www.gnu.org/licenses/why-not-lgpl.html>.
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