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1993-04-11
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WX(" GNU GENERAL PUBLIC LICENSE");
WX(" Version 2, June 1991");
WX("");
WX(" Copyright (C) 1989, 1991 Free Software Foundation, Inc.");
WX(" 675 Mass Ave, Cambridge, MA 02139, USA");
WX(" Everyone is permitted to copy and distribute verbatim copies");
WX(" of this license document, but changing it is not allowed.");
WX("");
WX(" Preamble");
WX("");
WX(" The licenses for most software are designed to take away your");
WX("freedom to share and change it. By contrast, the GNU General Public");
WX("License is intended to guarantee your freedom to share and change free");
WX("software--to make sure the software is free for all its users. This");
WX("General Public License applies to most of the Free Software");
WX("Foundation's software and to any other program whose authors commit to");
WX("using it. (Some other Free Software Foundation software is covered by");
WX("the GNU Library General Public License instead.) You can apply it to");
WX("your programs, too.");
WX("");
WX(" When we speak of free software, we are referring to freedom, not");
WX("price. Our General Public Licenses are designed to make sure that you");
WX("have the freedom to distribute copies of free software (and charge for");
WX("this service if you wish), that you receive source code or can get it");
WX("if you want it, that you can change the software or use pieces of it");
WX("in new free programs; and that you know you can do these things.");
WX("");
WX(" To protect your rights, we need to make restrictions that forbid");
WX("anyone to deny you these rights or to ask you to surrender the rights.");
WX("These restrictions translate to certain responsibilities for you if you");
WX("distribute copies of the software, or if you modify it.");
WX("");
WX(" For example, if you distribute copies of such a program, whether");
WX("gratis or for a fee, you must give the recipients all the rights that");
WX("you have. You must make sure that they, too, receive or can get the");
WX("source code. And you must show them these terms so they know their");
WX("rights.");
WX("");
WX(" We protect your rights with two steps: (1) copyright the software, and");
WX("(2) offer you this license which gives you legal permission to copy,");
WX("distribute and/or modify the software.");
WX("");
WX(" Also, for each author's protection and ours, we want to make certain");
WX("that everyone understands that there is no warranty for this free");
WX("software. If the software is modified by someone else and passed on, we");
WX("want its recipients to know that what they have is not the original, so");
WX("that any problems introduced by others will not reflect on the original");
WX("authors' reputations.");
WX("");
WX(" Finally, any free program is threatened constantly by software");
WX("patents. We wish to avoid the danger that redistributors of a free");
WX("program will individually obtain patent licenses, in effect making the");
WX("program proprietary. To prevent this, we have made it clear that any");
WX("patent must be licensed for everyone's free use or not licensed at all.");
WX("");
WX(" The precise terms and conditions for copying, distribution and");
WX("modification follow.");
WX("");
WX(" GNU GENERAL PUBLIC LICENSE");
WX(" TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION");
WX("");
WX(" 0. This License applies to any program or other work which contains");
WX("a notice placed by the copyright holder saying it may be distributed");
WX("under the terms of this General Public License. The \"Program\", below,");
WX("refers to any such program or work, and a \"work based on the Program\"");
WX("means either the Program or any derivative work under copyright law:");
WX("that is to say, a work containing the Program or a portion of it,");
WX("either verbatim or with modifications and/or translated into another");
WX("language. (Hereinafter, translation is included without limitation in");
WX("the term \"modification\".) Each licensee is addressed as \"you\".");
WX("");
WX("Activities other than copying, distribution and modification are not");
WX("covered by this License; they are outside its scope. The act of");
WX("running the Program is not restricted, and the output from the Program");
WX("is covered only if its contents constitute a work based on the");
WX("Program (independent of having been made by running the Program).");
WX("Whether that is true depends on what the Program does.");
WX("");
WX(" 1. You may copy and distribute verbatim copies of the Program's");
WX("source code as you receive it, in any medium, provided that you");
WX("conspicuously and appropriately publish on each copy an appropriate");
WX("copyright notice and disclaimer of warranty; keep intact all the");
WX("notices that refer to this License and to the absence of any warranty;");
WX("and give any other recipients of the Program a copy of this License");
WX("along with the Program.");
WX("");
WX("You may charge a fee for the physical act of transferring a copy, and");
WX("you may at your option offer warranty protection in exchange for a fee.");
WX("");
WX(" 2. You may modify your copy or copies of the Program or any portion");
WX("of it, thus forming a work based on the Program, and copy and");
WX("distribute such modifications or work under the terms of Section 1");
WX("above, provided that you also meet all of these conditions:");
WX("");
WX(" a) You must cause the modified files to carry prominent notices");
WX(" stating that you changed the files and the date of any change.");
WX("");
WX(" b) You must cause any work that you distribute or publish, that in");
WX(" whole or in part contains or is derived from the Program or any");
WX(" part thereof, to be licensed as a whole at no charge to all third");
WX(" parties under the terms of this License.");
WX("");
WX(" c) If the modified program normally reads commands interactively");
WX(" when run, you must cause it, when started running for such");
WX(" interactive use in the most ordinary way, to print or display an");
WX(" announcement including an appropriate copyright notice and a");
WX(" notice that there is no warranty (or else, saying that you provide");
WX(" a warranty) and that users may redistribute the program under");
WX(" these conditions, and telling the user how to view a copy of this");
WX(" License. (Exception: if the Program itself is interactive but");
WX(" does not normally print such an announcement, your work based on");
WX(" the Program is not required to print an announcement.)");
WX("");
WX("These requirements apply to the modified work as a whole. If");
WX("identifiable sections of that work are not derived from the Program,");
WX("and can be reasonably considered independent and separate works in");
WX("themselves, then this License, and its terms, do not apply to those");
WX("sections when you distribute them as separate works. But when you");
WX("distribute the same sections as part of a whole which is a work based");
WX("on the Program, the distribution of the whole must be on the terms of");
WX("this License, whose permissions for other licensees extend to the");
WX("entire whole, and thus to each and every part regardless of who wrote it.");
WX("");
WX("Thus, it is not the intent of this section to claim rights or contest");
WX("your rights to work written entirely by you; rather, the intent is to");
WX("exercise the right to control the distribution of derivative or");
WX("collective works based on the Program.");
WX("");
WX("In addition, mere aggregation of another work not based on the Program");
WX("with the Program (or with a work based on the Program) on a volume of");
WX("a storage or distribution medium does not bring the other work under");
WX("the scope of this License.");
WX("");
WX(" 3. You may copy and distribute the