1 GNU GENERAL PUBLIC LICENSE2 Version 3, 29 June 200734 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>5 Everyone is permitted to copy and distribute verbatim copies6 of this license document, but changing it is not allowed.78 Preamble910 The GNU General Public License is a free, copyleft license for11software and other kinds of works.1213 The licenses for most software and other practical works are designed14to take away your freedom to share and change the works. By contrast,15the GNU General Public License is intended to guarantee your freedom to16share and change all versions of a program--to make sure it remains free17software for all its users. We, the Free Software Foundation, use the18GNU General Public License for most of our software; it applies also to19any other work released this way by its authors. You can apply it to20your programs, too.2122 When we speak of free software, we are referring to freedom, not23price. Our General Public Licenses are designed to make sure that you24have the freedom to distribute copies of free software (and charge for25them if you wish), that you receive source code or can get it if you26want it, that you can change the software or use pieces of it in new27free programs, and that you know you can do these things.2829 To protect your rights, we need to prevent others from denying you30these rights or asking you to surrender the rights. Therefore, you have31certain responsibilities if you distribute copies of the software, or if32you modify it: responsibilities to respect the freedom of others.3334 For example, if you distribute copies of such a program, whether35gratis or for a fee, you must pass on to the recipients the same36freedoms that you received. You must make sure that they, too, receive37or can get the source code. And you must show them these terms so they38know their rights.3940 Developers that use the GNU GPL protect your rights with two steps:41(1) assert copyright on the software, and (2) offer you this License42giving you legal permission to copy, distribute and/or modify it.4344 For the developers' and authors' protection, the GPL clearly explains45that there is no warranty for this free software. For both users' and46authors' sake, the GPL requires that modified versions be marked as47changed, so that their problems will not be attributed erroneously to48authors of previous versions.4950 Some devices are designed to deny users access to install or run51modified versions of the software inside them, although the manufacturer52can do so. This is fundamentally incompatible with the aim of53protecting users' freedom to change the software. The systematic54pattern of such abuse occurs in the area of products for individuals to55use, which is precisely where it is most unacceptable. Therefore, we56have designed this version of the GPL to prohibit the practice for those57products. If such problems arise substantially in other domains, we58stand ready to extend this provision to those domains in future versions59of the GPL, as needed to protect the freedom of users.6061 Finally, every program is threatened constantly by software patents.62States should not allow patents to restrict development and use of63software on general-purpose computers, but in those that do, we wish to64avoid the special danger that patents applied to a free program could65make it effectively proprietary. To prevent this, the GPL assures that66patents cannot be used to render the program non-free.6768 The precise terms and conditions for copying, distribution and69modification follow.7071 TERMS AND CONDITIONS7273 0. Definitions.7475 "This License" refers to version 3 of the GNU General Public License.7677 "Copyright" also means copyright-like laws that apply to other kinds of78works, such as semiconductor masks.7980 "The Program" refers to any copyrightable work licensed under this81License. Each licensee is addressed as "you". "Licensees" and82"recipients" may be individuals or organizations.8384 To "modify" a work means to copy from or adapt all or part of the work85in a fashion requiring copyright permission, other than the making of an86exact copy. The resulting work is called a "modified version" of the87earlier work or a work "based on" the earlier work.8889 A "covered work" means either the unmodified Program or a work based90on the Program.9192 To "propagate" a work means to do anything with it that, without93permission, would make you directly or secondarily liable for94infringement under applicable copyright law, except executing it on a95computer or modifying a private copy. Propagation includes copying,96distribution (with or without modification), making available to the97public, and in some countries other activities as well.9899 To "convey" a work means any kind of propagation that enables other100parties to make or receive copies. Mere interaction with a user through101a computer network, with no transfer of a copy, is not conveying.102103 An interactive user interface displays "Appropriate Legal Notices"104to the extent that it includes a convenient and prominently visible105feature that (1) displays an appropriate copyright notice, and (2)106tells the user that there is no warranty for the work (except to the107extent that warranties are provided), that licensees may convey the108work under this License, and how to view a copy of this License. If109the interface presents a list of user commands or options, such as a110menu, a prominent item in the list meets this criterion.111112 1. Source Code.113114 The "source code" for a work means the preferred form of the work115for making modifications to it. "Object code" means any non-source116form of a work.117118 A "Standard Interface" means an interface that either is an official119standard defined by a recognized standards body, or, in the case of120interfaces specified for a particular programming language, one that121is widely used among developers working in that language.122123 The "System Libraries" of an executable work include anything, other124than the work as a whole, that (a) is included in the normal form of125packaging a Major Component, but which is not part of that Major126Component, and (b) serves only to enable use of the work with that127Major Component, or to implement a Standard Interface for which an128implementation is available to the public in source code form. 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For example, Corresponding Source141includes interface definition files associated with source files for142the work, and the source code for shared libraries and dynamically143linked subprograms that the work is specifically designed to require,144such as by intimate data communication or control flow between those145subprograms and other parts of the work.146147 The Corresponding Source need not include anything that users148can regenerate automatically from other parts of the Corresponding149Source.150151 The Corresponding Source for a work in source code form is that152same work.153154 2. Basic Permissions.155156 All rights granted under this License are granted for the term of157copyright on the Program, and are irrevocable provided the stated158conditions are met. This License explicitly affirms your unlimited159permission to run the unmodified Program. The output from running a160covered work is covered by this License only if the output, given its161content, constitutes a covered work. This License acknowledges your162rights of fair use or other equivalent, as provided by copyright law.163164 You may make, run and propagate covered works that you do not165convey, without conditions so long as your license otherwise remains166in force. You may convey covered works to others for the sole purpose167of having them make modifications exclusively for you, or provide you168with facilities for running those works, provided that you comply with169the terms of this License in conveying all material for which you do170not control copyright. Those thus making or running the covered works171for you must do so exclusively on your behalf, under your direction172and control, on terms that prohibit them from making any copies of173your copyrighted material outside their relationship with you.174175 Conveying under any other circumstances is permitted solely under176the conditions stated below. Sublicensing is not allowed; section 10177makes it unnecessary.178179 3. Protecting Users' Legal Rights From Anti-Circumvention Law.180181 No covered work shall be deemed part of an effective technological182measure under any applicable law fulfilling obligations under article18311 of the WIPO copyright treaty adopted on 20 December 1996, or184similar laws prohibiting or restricting circumvention of such185measures.186187 When you convey a covered work, you waive any legal power to forbid188circumvention of technological measures to the extent such circumvention189is effected by exercising rights under this License with respect to190the covered work, and you disclaim any intention to limit operation or191modification of the work as a means of enforcing, against the work's192users, your or third parties' legal rights to forbid circumvention of193technological measures.194195 4. Conveying Verbatim Copies.196197 You may convey verbatim copies of the Program's source code as you198receive it, in any medium, provided that you conspicuously and199appropriately publish on each copy an appropriate copyright notice;200keep intact all notices stating that this License and any201non-permissive terms added in accord with section 7 apply to the code;202keep intact all notices of the absence of any warranty; and give all203recipients a copy of this License along with the Program.204205 You may charge any price or no price for each copy that you convey,206and you may offer support or warranty protection for a fee.207208 5. Conveying Modified Source Versions.209210 You may convey a work based on the Program, or the modifications to211produce it from the Program, in the form of source code under the212terms of section 4, provided that you also meet all of these conditions:213214 a) The work must carry prominent notices stating that you modified215 it, and giving a relevant date.216217 b) The work must carry prominent notices stating that it is218 released under this License and any conditions added under section219 7. This requirement modifies the requirement in section 4 to220 "keep intact all notices".221222 c) You must license the entire work, as a whole, under this223 License to anyone who comes into possession of a copy. This224 License will therefore apply, along with any applicable section 7225 additional terms, to the whole of the work, and all its parts,226 regardless of how they are packaged. This License gives no227 permission to license the work in any other way, but it does not228 invalidate such permission if you have separately received it.229230 d) If the work has interactive user interfaces, each must display231 Appropriate Legal Notices; however, if the Program has interactive232 interfaces that do not display Appropriate Legal Notices, your233 work need not make them do so.234235 A compilation of a covered work with other separate and independent236works, which are not by their nature extensions of the covered work,237and which are not combined with it such as to form a larger program,238in or on a volume of a storage or distribution medium, is called an239"aggregate" if the compilation and its resulting copyright are not240used to limit the access or legal rights of the compilation's users241beyond what the individual works permit. Inclusion of a covered work242in an aggregate does not cause this License to apply to the other243parts of the aggregate.244245 6. Conveying Non-Source Forms.246247 You may convey a covered work in object code form under the terms248of sections 4 and 5, provided that you also convey the249machine-readable Corresponding Source under the terms of this License,250in one of these ways:251252 a) Convey the object code in, or embodied in, a physical product253 (including a physical distribution medium), accompanied by the254 Corresponding Source fixed on a durable physical medium255 customarily used for software interchange.256257 b) Convey the object code in, or embodied in, a physical product258 (including a physical distribution medium), accompanied by a259 written offer, valid for at least three years and valid for as260 long as you offer spare parts or customer support for that product261 model, to give anyone who possesses the object code either (1) a262 copy of the Corresponding Source for all the software in the263 product that is covered by this License, on a durable physical264 medium customarily used for software interchange, for a price no265 more than your reasonable cost of physically performing this266 conveying of source, or (2) access to copy the267 Corresponding Source from a network server at no charge.268269 c) Convey individual copies of the object code with a copy of the270 written offer to provide the Corresponding Source. This271 alternative is allowed only occasionally and noncommercially, and272 only if you received the object code with such an offer, in accord273 with subsection 6b.274275 d) Convey the object code by offering access from a designated276 place (gratis or for a charge), and offer equivalent access to the277 Corresponding Source in the same way through the same place at no278 further charge. You need not require recipients to copy the279 Corresponding Source along with the object code. If the place to280 copy the object code is a network server, the Corresponding Source281 may be on a different server (operated by you or a third party)282 that supports equivalent copying facilities, provided you maintain283 clear directions next to the object code saying where to find the284 Corresponding Source. Regardless of what server hosts the285 Corresponding Source, you remain obligated to ensure that it is286 available for as long as needed to satisfy these requirements.287288 e) Convey the object code using peer-to-peer transmission, provided289 you inform other peers where the object code and Corresponding290 Source of the work are being offered to the general public at no291 charge under subsection 6d.292293 A separable portion of the object code, whose source code is excluded294from the Corresponding Source as a System Library, need not be295included in conveying the object code work.296297 A "User Product" is either (1) a "consumer product", which means any298tangible personal property which is normally used for personal, family,299or household purposes, or (2) anything designed or sold for incorporation300into a dwelling. In determining whether a product is a consumer product,301doubtful cases shall be resolved in favor of coverage. For a particular302product received by a particular user, "normally used" refers to a303typical or common use of that class of product, regardless of the status304of the particular user or of the way in which the particular user305actually uses, or expects or is expected to use, the product. A product306is a consumer product regardless of whether the product has substantial307commercial, industrial or non-consumer uses, unless such uses represent308the only significant mode of use of the product.309310 "Installation Information" for a User Product means any methods,311procedures, authorization keys, or other information required to install312and execute modified versions of a covered work in that User Product from313a modified version of its Corresponding Source. The information must314suffice to ensure that the continued functioning of the modified object315code is in no case prevented or interfered with solely because316modification has been made.317318 If you convey an object code work under this section in, or with, or319specifically for use in, a User Product, and the conveying occurs as320part of a transaction in which the right of possession and use of the321User Product is transferred to the recipient in perpetuity or for a322fixed term (regardless of how the transaction is characterized), the323Corresponding Source conveyed under this section must be accompanied324by the Installation Information. But this requirement does not apply325if neither you nor any third party retains the ability to install326modified object code on the User Product (for example, the work has327been installed in ROM).328329 The requirement to provide Installation Information does not include a330requirement to continue to provide support service, warranty, or updates331for a work that has been modified or installed by the recipient, or for332the User Product in which it has been modified or installed. Access to a333network may be denied when the modification itself materially and334adversely affects the operation of the network or violates the rules and335protocols for communication across the network.336337 Corresponding Source conveyed, and Installation Information provided,338in accord with this section must be in a format that is publicly339documented (and with an implementation available to the public in340source code form), and must require no special password or key for341unpacking, reading or copying.342343 7. Additional Terms.344345 "Additional permissions" are terms that supplement the terms of this346License by making exceptions from one or more of its conditions.347Additional permissions that are applicable to the entire Program shall348be treated as though they were included in this License, to the extent349that they are valid under applicable law. If additional permissions350apply only to part of the Program, that part may be used separately351under those permissions, but the entire Program remains governed by352this License without regard to the additional permissions.353354 When you convey a copy of a covered work, you may at your option355remove any additional permissions from that copy, or from any part of356it. (Additional permissions may be written to require their own357removal in certain cases when you modify the work.) You may place358additional permissions on material, added by you to a covered work,359for which you have or can give appropriate copyright permission.360361 Notwithstanding any other provision of this License, for material you362add to a covered work, you may (if authorized by the copyright holders of363that material) supplement the terms of this License with terms:364365 a) Disclaiming warranty or limiting liability differently from the366 terms of sections 15 and 16 of this License; or367368 b) Requiring preservation of specified reasonable legal notices or369 author attributions in that material or in the Appropriate Legal370 Notices displayed by works containing it; or371372 c) Prohibiting misrepresentation of the origin of that material, or373 requiring that modified versions of such material be marked in374 reasonable ways as different from the original version; or375376 d) Limiting the use for publicity purposes of names of licensors or377 authors of the material; or378379 e) Declining to grant rights under trademark law for use of some380 trade names, trademarks, or service marks; or381382 f) Requiring indemnification of licensors and authors of that383 material by anyone who conveys the material (or modified versions of384 it) with contractual assumptions of liability to the recipient, for385 any liability that these contractual assumptions directly impose on386 those licensors and authors.387388 All other non-permissive additional terms are considered "further389restrictions" within the meaning of section 10. If the Program as you390received it, or any part of it, contains a notice stating that it is391governed by this License along with a term that is a further392restriction, you may remove that term. If a license document contains393a further restriction but permits relicensing or conveying under this394License, you may add to a covered work material governed by the terms395of that license document, provided that the further restriction does396not survive such relicensing or conveying.397398 If you add terms to a covered work in accord with this section, you399must place, in the relevant source files, a statement of the400additional terms that apply to those files, or a notice indicating401where to find the applicable terms.402403 Additional terms, permissive or non-permissive, may be stated in the404form of a separately written license, or stated as exceptions;405the above requirements apply either way.406407 8. Termination.408409 You may not propagate or modify a covered work except as expressly410provided under this License. Any attempt otherwise to propagate or411modify it is void, and will automatically terminate your rights under412this License (including any patent licenses granted under the third413paragraph of section 11).414415 However, if you cease all violation of this License, then your416license from a particular copyright holder is reinstated (a)417provisionally, unless and until the copyright holder explicitly and418finally terminates your license, and (b) permanently, if the copyright419holder fails to notify you of the violation by some reasonable means420prior to 60 days after the cessation.421422 Moreover, your license from a particular copyright holder is423reinstated permanently if the copyright holder notifies you of the424violation by some reasonable means, this is the first time you have425received notice of violation of this License (for any work) from that426copyright holder, and you cure the violation prior to 30 days after427your receipt of the notice.428429 Termination of your rights under this section does not terminate the430licenses of parties who have received copies or rights from you under431this License. If your rights have been terminated and not permanently432reinstated, you do not qualify to receive new licenses for the same433material under section 10.434435 9. Acceptance Not Required for Having Copies.436437 You are not required to accept this License in order to receive or438run a copy of the Program. Ancillary propagation of a covered work439occurring solely as a consequence of using peer-to-peer transmission440to receive a copy likewise does not require acceptance. However,441nothing other than this License grants you permission to propagate or442modify any covered work. These actions infringe copyright if you do443not accept this License. Therefore, by modifying or propagating a444covered work, you indicate your acceptance of this License to do so.445446 10. Automatic Licensing of Downstream Recipients.447448 Each time you convey a covered work, the recipient automatically449receives a license from the original licensors, to run, modify and450propagate that work, subject to this License. You are not responsible451for enforcing compliance by third parties with this License.452453 An "entity transaction" is a transaction transferring control of an454organization, or substantially all assets of one, or subdividing an455organization, or merging organizations. If propagation of a covered456work results from an entity transaction, each party to that457transaction who receives a copy of the work also receives whatever458licenses to the work the party's predecessor in interest had or could459give under the previous paragraph, plus a right to possession of the460Corresponding Source of the work from the predecessor in interest, if461the predecessor has it or can get it with reasonable efforts.462463 You may not impose any further restrictions on the exercise of the464rights granted or affirmed under this License. For example, you may465not impose a license fee, royalty, or other charge for exercise of466rights granted under this License, and you may not initiate litigation467(including a cross-claim or counterclaim in a lawsuit) alleging that468any patent claim is infringed by making, using, selling, offering for469sale, or importing the Program or any portion of it.470471 11. Patents.472473 A "contributor" is a copyright holder who authorizes use under this474License of the Program or a work on which the Program is based. The475work thus licensed is called the contributor's "contributor version".476477 A contributor's "essential patent claims" are all patent claims478owned or controlled by the contributor, whether already acquired or479hereafter acquired, that would be infringed by some manner, permitted480by this License, of making, using, or selling its contributor version,481but do not include claims that would be infringed only as a482consequence of further modification of the contributor version. For483purposes of this definition, "control" includes the right to grant484patent sublicenses in a manner consistent with the requirements of485this License.486487 Each contributor grants you a non-exclusive, worldwide, royalty-free488patent license under the contributor's essential patent claims, to489make, use, sell, offer for sale, import and otherwise run, modify and490propagate the contents of its contributor version.491492 In the following three paragraphs, a "patent license" is any express493agreement or commitment, however denominated, not to enforce a patent494(such as an express permission to practice a patent or covenant not to495sue for patent infringement). To "grant" such a patent license to a496party means to make such an agreement or commitment not to enforce a497patent against the party.498499 If you convey a covered work, knowingly relying on a patent license,500and the Corresponding Source of the work is not available for anyone501to copy, free of charge and under the terms of this License, through a502publicly available network server or other readily accessible means,503then you must either (1) cause the Corresponding Source to be so504available, or (2) arrange to deprive yourself of the benefit of the505patent license for this particular work, or (3) arrange, in a manner506consistent with the requirements of this License, to extend the patent507license to downstream recipients. "Knowingly relying" means you have508actual knowledge that, but for the patent license, your conveying the509covered work in a country, or your recipient's use of the covered work510in a country, would infringe one or more identifiable patents in that511country that you have reason to believe are valid.512513 If, pursuant to or in connection with a single transaction or514arrangement, you convey, or propagate by procuring conveyance of, a515covered work, and grant a patent license to some of the parties516receiving the covered work authorizing them to use, propagate, modify517or convey a specific copy of the covered work, then the patent license518you grant is automatically extended to all recipients of the covered519work and works based on it.520521 A patent license is "discriminatory" if it does not include within522the scope of its coverage, prohibits the exercise of, or is523conditioned on the non-exercise of one or more of the rights that are524specifically granted under this License. You may not convey a covered525work if you are a party to an arrangement with a third party that is526in the business of distributing software, under which you make payment527to the third party based on the extent of your activity of conveying528the work, and under which the third party grants, to any of the529parties who would receive the covered work from you, a discriminatory530patent license (a) in connection with copies of the covered work531conveyed by you (or copies made from those copies), or (b) primarily532for and in connection with specific products or compilations that533contain the covered work, unless you entered into that arrangement,534or that patent license was granted, prior to 28 March 2007.535536 Nothing in this License shall be construed as excluding or limiting537any implied license or other defenses to infringement that may538otherwise be available to you under applicable patent law.539540 12. No Surrender of Others' Freedom.541542 If conditions are imposed on you (whether by court order, agreement or543otherwise) that contradict the conditions of this License, they do not544excuse you from the conditions of this License. If you cannot convey a545covered work so as to satisfy simultaneously your obligations under this546License and any other pertinent obligations, then as a consequence you may547not convey it at all. For example, if you agree to terms that obligate you548to collect a royalty for further conveying from those to whom you convey549the Program, the only way you could satisfy both those terms and this550License would be to refrain entirely from conveying the Program.551552 13. Use with the GNU Affero General Public License.553554 Notwithstanding any other provision of this License, you have555permission to link or combine any covered work with a work licensed556under version 3 of the GNU Affero General Public License into a single557combined work, and to convey the resulting work. The terms of this558License will continue to apply to the part which is the covered work,559but the special requirements of the GNU Affero General Public License,560section 13, concerning interaction through a network will apply to the561combination as such.562563 14. Revised Versions of this License.564565 The Free Software Foundation may publish revised and/or new versions of566the GNU General Public License from time to time. Such new versions will567be similar in spirit to the present version, but may differ in detail to568address new problems or concerns.569570 Each version is given a distinguishing version number. If the571Program specifies that a certain numbered version of the GNU General572Public License "or any later version" applies to it, you have the573option of following the terms and conditions either of that numbered574version or of any later version published by the Free Software575Foundation. If the Program does not specify a version number of the576GNU General Public License, you may choose any version ever published577by the Free Software Foundation.578579 If the Program specifies that a proxy can decide which future580versions of the GNU General Public License can be used, that proxy's581public statement of acceptance of a version permanently authorizes you582to choose that version for the Program.583584 Later license versions may give you additional or different585permissions. However, no additional obligations are imposed on any586author or copyright holder as a result of your choosing to follow a587later version.588589 15. Disclaimer of Warranty.590591 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY592APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT593HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY594OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,595THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR596PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM597IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF598ALL NECESSARY SERVICING, REPAIR OR CORRECTION.599600 16. Limitation of Liability.601602 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING603WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS604THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY605GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE606USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF607DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD608PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),609EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF610SUCH DAMAGES.611612 17. Interpretation of Sections 15 and 16.613614 If the disclaimer of warranty and limitation of liability provided615above cannot be given local legal effect according to their terms,616reviewing courts shall apply local law that most closely approximates617an absolute waiver of all civil liability in connection with the618Program, unless a warranty or assumption of liability accompanies a619copy of the Program in return for a fee.620621 END OF TERMS AND CONDITIONS622623 How to Apply These Terms to Your New Programs624625 If you develop a new program, and you want it to be of the greatest626possible use to the public, the best way to achieve this is to make it627free software which everyone can redistribute and change under these terms.628629 To do so, attach the following notices to the program. It is safest630to attach them to the start of each source file to most effectively631state the exclusion of warranty; and each file should have at least632the "copyright" line and a pointer to where the full notice is found.633634 <one line to give the program's name and a brief idea of what it does.>635 Copyright (C) <year> <name of author>636637 This program is free software: you can redistribute it and/or modify638 it under the terms of the GNU General Public License as published by639 the Free Software Foundation, either version 3 of the License, or640 (at your option) any later version.641642 This program is distributed in the hope that it will be useful,643 but WITHOUT ANY WARRANTY; without even the implied warranty of644 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the645 GNU General Public License for more details.646647 You should have received a copy of the GNU General Public License648 along with this program. If not, see <https://www.gnu.org/licenses/>.649650Also add information on how to contact you by electronic and paper mail.651652 If the program does terminal interaction, make it output a short653notice like this when it starts in an interactive mode:654655 <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 it658 under certain conditions; type `show c' for details.659660The hypothetical commands `show w' and `show c' should show the appropriate661parts of the General Public License. Of course, your program's commands662might be different; for a GUI interface, you would use an "about box".663664 You should also get your employer (if you work as a programmer) or school,665if any, to sign a "copyright disclaimer" for the program, if necessary.666For more information on this, and how to apply and follow the GNU GPL, see667<https://www.gnu.org/licenses/>.668669 The GNU General Public License does not permit incorporating your program670into proprietary programs. If your program is a subroutine library, you671may consider it more useful to permit linking proprietary applications with672the library. If this is what you want to do, use the GNU Lesser General673Public License instead of this License. But first, please read674<https://www.gnu.org/licenses/why-not-lgpl.html>.