1This software is released under the GNU General Public License 2(reproduced below) with the additional exemption that compiling, 3linking, and/or using OpenSSL together with this software is 4allowed. 5 6--- 7 8 GNU GENERAL PUBLIC LICENSE 9 Version 2, June 1991 10 11 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 12 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 13 Everyone is permitted to copy and distribute verbatim copies 14 of this license document, but changing it is not allowed. 15 16 Preamble 17 18 The licenses for most software are designed to take away your 19freedom to share and change it. By contrast, the GNU General Public 20License is intended to guarantee your freedom to share and change free 21software--to make sure the software is free for all its users. This 22General Public License applies to most of the Free Software 23Foundation's software and to any other program whose authors commit to 24using it. (Some other Free Software Foundation software is covered by 25the GNU Lesser General Public License instead.) You can apply it to 26your programs, too. 27 28 When we speak of free software, we are referring to freedom, not 29price. Our General Public Licenses are designed to make sure that you 30have the freedom to distribute copies of free software (and charge for 31this service if you wish), that you receive source code or can get it 32if you want it, that you can change the software or use pieces of it 33in new free programs; and that you know you can do these things. 34 35 To protect your rights, we need to make restrictions that forbid 36anyone to deny you these rights or to ask you to surrender the rights. 37These restrictions translate to certain responsibilities for you if you 38distribute copies of the software, or if you modify it. 39 40 For example, if you distribute copies of such a program, whether 41gratis or for a fee, you must give the recipients all the rights that 42you have. You must make sure that they, too, receive or can get the 43source code. And you must show them these terms so they know their 44rights. 45 46 We protect your rights with two steps: (1) copyright the software, and 47(2) offer you this license which gives you legal permission to copy, 48distribute and/or modify the software. 49 50 Also, for each author's protection and ours, we want to make certain 51that everyone understands that there is no warranty for this free 52software. If the software is modified by someone else and passed on, we 53want its recipients to know that what they have is not the original, so 54that any problems introduced by others will not reflect on the original 55authors' reputations. 56 57 Finally, any free program is threatened constantly by software 58patents. We wish to avoid the danger that redistributors of a free 59program will individually obtain patent licenses, in effect making the 60program proprietary. To prevent this, we have made it clear that any 61patent must be licensed for everyone's free use or not licensed at all. 62 63 The precise terms and conditions for copying, distribution and 64modification follow. 65 66 GNU GENERAL PUBLIC LICENSE 67 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 68 69 0. This License applies to any program or other work which contains 70a notice placed by the copyright holder saying it may be distributed 71under the terms of this General Public License. The "Program", below, 72refers to any such program or work, and a "work based on the Program" 73means either the Program or any derivative work under copyright law: 74that is to say, a work containing the Program or a portion of it, 75either verbatim or with modifications and/or translated into another 76language. (Hereinafter, translation is included without limitation in 77the term "modification".) Each licensee is addressed as "you". 78 79Activities other than copying, distribution and modification are not 80covered by this License; they are outside its scope. The act of 81running the Program is not restricted, and the output from the Program 82is covered only if its contents constitute a work based on the 83Program (independent of having been made by running the Program). 84Whether that is true depends on what the Program does. 85 86 1. You may copy and distribute verbatim copies of the Program's 87source code as you receive it, in any medium, provided that you 88conspicuously and appropriately publish on each copy an appropriate 89copyright notice and disclaimer of warranty; keep intact all the 90notices that refer to this License and to the absence of any warranty; 91and give any other recipients of the Program a copy of this License 92along with the Program. 93 94You may charge a fee for the physical act of transferring a copy, and 95you may at your option offer warranty protection in exchange for a fee. 96 97 2. You may modify your copy or copies of the Program or any portion 98of it, thus forming a work based on the Program, and copy and 99distribute such modifications or work under the terms of Section 1 100above, provided that you also meet all of these conditions: 101 102 a) You must cause the modified files to carry prominent notices 103 stating that you changed the files and the date of any change. 104 105 b) You must cause any work that you distribute or publish, that in 106 whole or in part contains or is derived from the Program or any 107 part thereof, to be licensed as a whole at no charge to all third 108 parties under the terms of this License. 109 110 c) If the modified program normally reads commands interactively 111 when run, you must cause it, when started running for such 112 interactive use in the most ordinary way, to print or display an 113 announcement including an appropriate copyright notice and a 114 notice that there is no warranty (or else, saying that you provide 115 a warranty) and that users may redistribute the program under 116 these conditions, and telling the user how to view a copy of this 117 License. (Exception: if the Program itself is interactive but 118 does not normally print such an announcement, your work based on 119 the Program is not required to print an announcement.) 120 121These requirements apply to the modified work as a whole. If 122identifiable sections of that work are not derived from the Program, 123and can be reasonably considered independent and separate works in 124themselves, then this License, and its terms, do not apply to those 125sections when you distribute them as separate works. But when you 126distribute the same sections as part of a whole which is a work based 127on the Program, the distribution of the whole must be on the terms of 128this License, whose permissions for other licensees extend to the 129entire whole, and thus to each and every part regardless of who wrote it. 130 131Thus, it is not the intent of this section to claim rights or contest 132your rights to work written entirely by you; rather, the intent is to 133exercise the right to control the distribution of derivative or 134collective works based on the Program. 135 136In addition, mere aggregation of another work not based on the Program 137with the Program (or with a work based on the Program) on a volume of 138a storage or distribution medium does not bring the other work under 139the scope of this License. 140 141 3. You may copy and distribute the Program (or a work based on it, 142under Section 2) in object code or executable form under the terms of 143Sections 1 and 2 above provided that you also do one of the following: 144 145 a) Accompany it with the complete corresponding machine-readable 146 source code, which must be distributed under the terms of Sections 147 1 and 2 above on a medium customarily used for software interchange; or, 148 149 b) Accompany it with a written offer, valid for at least three 150 years, to give any third party, for a charge no more than your 151 cost of physically performing source distribution, a complete 152 machine-readable copy of the corresponding source code, to be 153 distributed under the terms of Sections 1 and 2 above on a medium 154 customarily used for software interchange; or, 155 156 c) Accompany it with the information you received as to the offer 157 to distribute corresponding source code. (This alternative is 158 allowed only for noncommercial distribution and only if you 159 received the program in object code or executable form with such 160 an offer, in accord with Subsection b above.) 161 162The source code for a work means the preferred form of the work for 163making modifications to it. For an executable work, complete source 164code means all the source code for all modules it contains, plus any 165associated interface definition files, plus the scripts used to 166control compilation and installation of the executable. However, as a 167special exception, the source code distributed need not include 168anything that is normally distributed (in either source or binary 169form) with the major components (compiler, kernel, and so on) of the 170operating system on which the executable runs, unless that component 171itself accompanies the executable. 172 173If distribution of executable or object code is made by offering 174access to copy from a designated place, then offering equivalent 175access to copy the source code from the same place counts as 176distribution of the source code, even though third parties are not 177compelled to copy the source along with the object code. 178 179 4. You may not copy, modify, sublicense, or distribute the Program 180except as expressly provided under this License. Any attempt 181otherwise to copy, modify, sublicense or distribute the Program is 182void, and will automatically terminate your rights under this License. 183However, parties who have received copies, or rights, from you under 184this License will not have their licenses terminated so long as such 185parties remain in full compliance. 186 187 5. You are not required to accept this License, since you have not 188signed it. However, nothing else grants you permission to modify or 189distribute the Program or its derivative works. These actions are 190prohibited by law if you do not accept this License. Therefore, by 191modifying or distributing the Program (or any work based on the 192Program), you indicate your acceptance of this License to do so, and 193all its terms and conditions for copying, distributing or modifying 194the Program or works based on it. 195 196 6. Each time you redistribute the Program (or any work based on the 197Program), the recipient automatically receives a license from the 198original licensor to copy, distribute or modify the Program subject to 199these terms and conditions. You may not impose any further 200restrictions on the recipients' exercise of the rights granted herein. 201You are not responsible for enforcing compliance by third parties to 202this License. 203 204 7. If, as a consequence of a court judgment or allegation of patent 205infringement or for any other reason (not limited to patent issues), 206conditions are imposed on you (whether by court order, agreement or 207otherwise) that contradict the conditions of this License, they do not 208excuse you from the conditions of this License. If you cannot 209distribute so as to satisfy simultaneously your obligations under this 210License and any other pertinent obligations, then as a consequence you 211may not distribute the Program at all. For example, if a patent 212license would not permit royalty-free redistribution of the Program by 213all those who receive copies directly or indirectly through you, then 214the only way you could satisfy both it and this License would be to 215refrain entirely from distribution of the Program. 216 217If any portion of this section is held invalid or unenforceable under 218any particular circumstance, the balance of the section is intended to 219apply and the section as a whole is intended to apply in other 220circumstances. 221 222It is not the purpose of this section to induce you to infringe any 223patents or other property right claims or to contest validity of any 224such claims; this section has the sole purpose of protecting the 225integrity of the free software distribution system, which is 226implemented by public license practices. Many people have made 227generous contributions to the wide range of software distributed 228through that system in reliance on consistent application of that 229system; it is up to the author/donor to decide if he or she is willing 230to distribute software through any other system and a licensee cannot 231impose that choice. 232 233This section is intended to make thoroughly clear what is believed to 234be a consequence of the rest of this License. 235 236 8. If the distribution and/or use of the Program is restricted in 237certain countries either by patents or by copyrighted interfaces, the 238original copyright holder who places the Program under this License 239may add an explicit geographical distribution limitation excluding 240those countries, so that distribution is permitted only in or among 241countries not thus excluded. In such case, this License incorporates 242the limitation as if written in the body of this License. 243 244 9. The Free Software Foundation may publish revised and/or new versions 245of the General Public License from time to time. Such new versions will 246be similar in spirit to the present version, but may differ in detail to 247address new problems or concerns. 248 249Each version is given a distinguishing version number. If the Program 250specifies a version number of this License which applies to it and "any 251later version", you have the option of following the terms and conditions 252either of that version or of any later version published by the Free 253Software Foundation. If the Program does not specify a version number of 254this License, you may choose any version ever published by the Free Software 255Foundation. 256 257 10. If you wish to incorporate parts of the Program into other free 258programs whose distribution conditions are different, write to the author 259to ask for permission. For software which is copyrighted by the Free 260Software Foundation, write to the Free Software Foundation; we sometimes 261make exceptions for this. Our decision will be guided by the two goals 262of preserving the free status of all derivatives of our free software and 263of promoting the sharing and reuse of software generally. 264 265 NO WARRANTY 266 267 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 268FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 269OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 270PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 271OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 272MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 273TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 274PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 275REPAIR OR CORRECTION. 276 277 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 278WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 279REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 280INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 281OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 282TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 283YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 284PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 285POSSIBILITY OF SUCH DAMAGES. 286 287 END OF TERMS AND CONDITIONS 288 289 How to Apply These Terms to Your New Programs 290 291 If you develop a new program, and you want it to be of the greatest 292possible use to the public, the best way to achieve this is to make it 293free software which everyone can redistribute and change under these terms. 294 295 To do so, attach the following notices to the program. It is safest 296to attach them to the start of each source file to most effectively 297convey the exclusion of warranty; and each file should have at least 298the "copyright" line and a pointer to where the full notice is found. 299 300 <one line to give the program's name and a brief idea of what it does.> 301 Copyright (C) <year> <name of author> 302 303 This program is free software; you can redistribute it and/or modify 304 it under the terms of the GNU General Public License as published by 305 the Free Software Foundation; either version 2 of the License, or 306 (at your option) any later version. 307 308 This program is distributed in the hope that it will be useful, 309 but WITHOUT ANY WARRANTY; without even the implied warranty of 310 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 311 GNU General Public License for more details. 312 313 You should have received a copy of the GNU General Public License along 314 with this program; if not, write to the Free Software Foundation, Inc., 315 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 316 317Also add information on how to contact you by electronic and paper mail. 318 319If the program is interactive, make it output a short notice like this 320when it starts in an interactive mode: 321 322 Gnomovision version 69, Copyright (C) year name of author 323 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 324 This is free software, and you are welcome to redistribute it 325 under certain conditions; type `show c' for details. 326 327The hypothetical commands `show w' and `show c' should show the appropriate 328parts of the General Public License. Of course, the commands you use may 329be called something other than `show w' and `show c'; they could even be 330mouse-clicks or menu items--whatever suits your program. 331 332You should also get your employer (if you work as a programmer) or your 333school, if any, to sign a "copyright disclaimer" for the program, if 334necessary. Here is a sample; alter the names: 335 336 Yoyodyne, Inc., hereby disclaims all copyright interest in the program 337 `Gnomovision' (which makes passes at compilers) written by James Hacker. 338 339 <signature of Ty Coon>, 1 April 1989 340 Ty Coon, President of Vice 341 342This General Public License does not permit incorporating your program into 343proprietary programs. If your program is a subroutine library, you may 344consider it more useful to permit linking proprietary applications with the 345library. If this is what you want to do, use the GNU Lesser General 346Public License instead of this License. 347