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29 <h1 class="SECT1"><a name="COPYRIGHT">12. Privoxy Copyright, License and History</a></h1>
30 <p>Copyright © 2001-2020 by Privoxy Developers <code class="EMAIL"><<a href=
31 "mailto:privoxy-devel@lists.privoxy.org">privoxy-devel@lists.privoxy.org</a>></code></p>
32 <p>Some source code is based on code Copyright © 1997 by Anonymous Coders and Junkbusters, Inc. and licensed
33 under the <i class="CITETITLE">GNU General Public License</i>.</p>
34 <p><span class="APPLICATION">Privoxy</span> is free software; you can redistribute and/or modify its source code
35 under the terms of the <i class="CITETITLE">GNU General Public License</i> as published by the Free Software
36 Foundation, either version 2 of the license, or (at your option) any later version.</p>
37 <p>The same is true for <span class="APPLICATION">Privoxy</span> binaries unless they are linked with a <a href=
38 "https://tls.mbed.org/" target="_top">mbed TLS</a> version that is licensed under the Apache 2.0 license in which
39 case you can redistribute and/or modify the <span class="APPLICATION">Privoxy</span> binaries under the terms of
40 the <i class="CITETITLE">GNU General Public License</i> as published by the Free Software Foundation, either
41 version 3 of the license, or (at your option) any later version.</p>
42 <p>Both licenses are included in the next section.</p>
44 <h2 class="SECT2"><a name="LICENSE">12.1. License</a></h2>
46 <h3 class="SECT3"><a name="GPLV2">12.1.1. GNU General Public License version 2</a></h3>
47 <table border="0" bgcolor="#E0E0E0" width="100%">
50 <pre class="SCREEN"> GNU GENERAL PUBLIC LICENSE
53 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
54 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
55 Everyone is permitted to copy and distribute verbatim copies
56 of this license document, but changing it is not allowed.
60 The licenses for most software are designed to take away your
61 freedom to share and change it. By contrast, the GNU General Public
62 License is intended to guarantee your freedom to share and change free
63 software--to make sure the software is free for all its users. This
64 General Public License applies to most of the Free Software
65 Foundation's software and to any other program whose authors commit to
66 using it. (Some other Free Software Foundation software is covered by
67 the GNU Lesser General Public License instead.) You can apply it to
70 When we speak of free software, we are referring to freedom, not
71 price. Our General Public Licenses are designed to make sure that you
72 have the freedom to distribute copies of free software (and charge for
73 this service if you wish), that you receive source code or can get it
74 if you want it, that you can change the software or use pieces of it
75 in new free programs; and that you know you can do these things.
77 To protect your rights, we need to make restrictions that forbid
78 anyone to deny you these rights or to ask you to surrender the rights.
79 These restrictions translate to certain responsibilities for you if you
80 distribute copies of the software, or if you modify it.
82 For example, if you distribute copies of such a program, whether
83 gratis or for a fee, you must give the recipients all the rights that
84 you have. You must make sure that they, too, receive or can get the
85 source code. And you must show them these terms so they know their
88 We protect your rights with two steps: (1) copyright the software, and
89 (2) offer you this license which gives you legal permission to copy,
90 distribute and/or modify the software.
92 Also, for each author's protection and ours, we want to make certain
93 that everyone understands that there is no warranty for this free
94 software. If the software is modified by someone else and passed on, we
95 want its recipients to know that what they have is not the original, so
96 that any problems introduced by others will not reflect on the original
99 Finally, any free program is threatened constantly by software
100 patents. We wish to avoid the danger that redistributors of a free
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102 program proprietary. To prevent this, we have made it clear that any
103 patent must be licensed for everyone's free use or not licensed at all.
105 The precise terms and conditions for copying, distribution and
108 GNU GENERAL PUBLIC LICENSE
109 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
111 0. This License applies to any program or other work which contains
112 a notice placed by the copyright holder saying it may be distributed
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126 Whether that is true depends on what the Program does.
128 1. You may copy and distribute verbatim copies of the Program's
129 source code as you receive it, in any medium, provided that you
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163 These requirements apply to the modified work as a whole. If
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320 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
321 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
322 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
323 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
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329 END OF TERMS AND CONDITIONS
331 How to Apply These Terms to Your New Programs
333 If you develop a new program, and you want it to be of the greatest
334 possible use to the public, the best way to achieve this is to make it
335 free software which everyone can redistribute and change under these terms.
337 To do so, attach the following notices to the program. It is safest
338 to attach them to the start of each source file to most effectively
339 convey the exclusion of warranty; and each file should have at least
340 the "copyright" line and a pointer to where the full notice is found.
342 <one line to give the program's name and a brief idea of what it does.>
343 Copyright (C) <year> <name of author>
345 This program is free software; you can redistribute it and/or modify
346 it under the terms of the GNU General Public License as published by
347 the Free Software Foundation; either version 2 of the License, or
348 (at your option) any later version.
350 This program is distributed in the hope that it will be useful,
351 but WITHOUT ANY WARRANTY; without even the implied warranty of
352 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
353 GNU General Public License for more details.
355 You should have received a copy of the GNU General Public License along
356 with this program; if not, write to the Free Software Foundation, Inc.,
357 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
359 Also add information on how to contact you by electronic and paper mail.
361 If the program is interactive, make it output a short notice like this
362 when it starts in an interactive mode:
364 Gnomovision version 69, Copyright (C) year name of author
365 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
366 This is free software, and you are welcome to redistribute it
367 under certain conditions; type `show c' for details.
369 The hypothetical commands `show w' and `show c' should show the appropriate
370 parts of the General Public License. Of course, the commands you use may
371 be called something other than `show w' and `show c'; they could even be
372 mouse-clicks or menu items--whatever suits your program.
374 You should also get your employer (if you work as a programmer) or your
375 school, if any, to sign a "copyright disclaimer" for the program, if
376 necessary. Here is a sample; alter the names:
378 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
379 `Gnomovision' (which makes passes at compilers) written by James Hacker.
381 <signature of Ty Coon>, 1 April 1989
382 Ty Coon, President of Vice
384 This General Public License does not permit incorporating your program into
385 proprietary programs. If your program is a subroutine library, you may
386 consider it more useful to permit linking proprietary applications with the
387 library. If this is what you want to do, use the GNU Lesser General
388 Public License instead of this License.
395 <h3 class="SECT3"><a name="GPLV3">12.1.2. GNU General Public License version 3</a></h3>
396 <table border="0" bgcolor="#E0E0E0" width="100%">
399 <pre class="SCREEN"> GNU GENERAL PUBLIC LICENSE
400 Version 3, 29 June 2007
402 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
403 Everyone is permitted to copy and distribute verbatim copies
404 of this license document, but changing it is not allowed.
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409 software and other kinds of works.
411 The licenses for most software and other practical works are designed
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413 the GNU General Public License is intended to guarantee your freedom to
414 share and change all versions of a program--to make sure it remains free
415 software for all its users. We, the Free Software Foundation, use the
416 GNU General Public License for most of our software; it applies also to
417 any other work released this way by its authors. You can apply it to
420 When we speak of free software, we are referring to freedom, not
421 price. Our General Public Licenses are designed to make sure that you
422 have the freedom to distribute copies of free software (and charge for
423 them if you wish), that you receive source code or can get it if you
424 want it, that you can change the software or use pieces of it in new
425 free programs, and that you know you can do these things.
427 To protect your rights, we need to prevent others from denying you
428 these rights or asking you to surrender the rights. Therefore, you have
429 certain responsibilities if you distribute copies of the software, or if
430 you modify it: responsibilities to respect the freedom of others.
432 For example, if you distribute copies of such a program, whether
433 gratis or for a fee, you must pass on to the recipients the same
434 freedoms that you received. You must make sure that they, too, receive
435 or can get the source code. And you must show them these terms so they
438 Developers that use the GNU GPL protect your rights with two steps:
439 (1) assert copyright on the software, and (2) offer you this License
440 giving you legal permission to copy, distribute and/or modify it.
442 For the developers' and authors' protection, the GPL clearly explains
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833 9. Acceptance Not Required for Having Copies.
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871 A "contributor" is a copyright holder who authorizes use under this
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904 consistent with the requirements of this License, to extend the patent
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906 actual knowledge that, but for the patent license, your conveying the
907 covered work in a country, or your recipient's use of the covered work
908 in a country, would infringe one or more identifiable patents in that
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911 If, pursuant to or in connection with a single transaction or
912 arrangement, you convey, or propagate by procuring conveyance of, a
913 covered work, and grant a patent license to some of the parties
914 receiving the covered work authorizing them to use, propagate, modify
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917 work and works based on it.
919 A patent license is "discriminatory" if it does not include within
920 the scope of its coverage, prohibits the exercise of, or is
921 conditioned on the non-exercise of one or more of the rights that are
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930 for and in connection with specific products or compilations that
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932 or that patent license was granted, prior to 28 March 2007.
934 Nothing in this License shall be construed as excluding or limiting
935 any implied license or other defenses to infringement that may
936 otherwise be available to you under applicable patent law.
938 12. No Surrender of Others' Freedom.
940 If conditions are imposed on you (whether by court order, agreement or
941 otherwise) that contradict the conditions of this License, they do not
942 excuse you from the conditions of this License. If you cannot convey a
943 covered work so as to satisfy simultaneously your obligations under this
944 License and any other pertinent obligations, then as a consequence you may
945 not convey it at all. For example, if you agree to terms that obligate you
946 to collect a royalty for further conveying from those to whom you convey
947 the Program, the only way you could satisfy both those terms and this
948 License would be to refrain entirely from conveying the Program.
950 13. Use with the GNU Affero General Public License.
952 Notwithstanding any other provision of this License, you have
953 permission to link or combine any covered work with a work licensed
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955 combined work, and to convey the resulting work. The terms of this
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957 but the special requirements of the GNU Affero General Public License,
958 section 13, concerning interaction through a network will apply to the
961 14. Revised Versions of this License.
963 The Free Software Foundation may publish revised and/or new versions of
964 the GNU General Public License from time to time. Such new versions will
965 be similar in spirit to the present version, but may differ in detail to
966 address new problems or concerns.
968 Each version is given a distinguishing version number. If the
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971 option of following the terms and conditions either of that numbered
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974 GNU General Public License, you may choose any version ever published
975 by the Free Software Foundation.
977 If the Program specifies that a proxy can decide which future
978 versions of the GNU General Public License can be used, that proxy's
979 public statement of acceptance of a version permanently authorizes you
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982 Later license versions may give you additional or different
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987 15. Disclaimer of Warranty.
989 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
990 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
991 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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995 IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
996 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
998 16. Limitation of Liability.
1000 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
1001 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
1002 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
1003 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
1004 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
1005 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
1006 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
1007 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
1010 17. Interpretation of Sections 15 and 16.
1012 If the disclaimer of warranty and limitation of liability provided
1013 above cannot be given local legal effect according to their terms,
1014 reviewing courts shall apply local law that most closely approximates
1015 an absolute waiver of all civil liability in connection with the
1016 Program, unless a warranty or assumption of liability accompanies a
1017 copy of the Program in return for a fee.
1019 END OF TERMS AND CONDITIONS
1021 How to Apply These Terms to Your New Programs
1023 If you develop a new program, and you want it to be of the greatest
1024 possible use to the public, the best way to achieve this is to make it
1025 free software which everyone can redistribute and change under these terms.
1027 To do so, attach the following notices to the program. It is safest
1028 to attach them to the start of each source file to most effectively
1029 state the exclusion of warranty; and each file should have at least
1030 the "copyright" line and a pointer to where the full notice is found.
1032 <one line to give the program's name and a brief idea of what it does.>
1033 Copyright (C) <year> <name of author>
1035 This program is free software: you can redistribute it and/or modify
1036 it under the terms of the GNU General Public License as published by
1037 the Free Software Foundation, either version 3 of the License, or
1038 (at your option) any later version.
1040 This program is distributed in the hope that it will be useful,
1041 but WITHOUT ANY WARRANTY; without even the implied warranty of
1042 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1043 GNU General Public License for more details.
1045 You should have received a copy of the GNU General Public License
1046 along with this program. If not, see <https://www.gnu.org/licenses/>.
1048 Also add information on how to contact you by electronic and paper mail.
1050 If the program does terminal interaction, make it output a short
1051 notice like this when it starts in an interactive mode:
1053 <program> Copyright (C) <year> <name of author>
1054 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
1055 This is free software, and you are welcome to redistribute it
1056 under certain conditions; type `show c' for details.
1058 The hypothetical commands `show w' and `show c' should show the appropriate
1059 parts of the General Public License. Of course, your program's commands
1060 might be different; for a GUI interface, you would use an "about box".
1062 You should also get your employer (if you work as a programmer) or school,
1063 if any, to sign a "copyright disclaimer" for the program, if necessary.
1064 For more information on this, and how to apply and follow the GNU GPL, see
1065 <https://www.gnu.org/licenses/>.
1067 The GNU General Public License does not permit incorporating your program
1068 into proprietary programs. If your program is a subroutine library, you
1069 may consider it more useful to permit linking proprietary applications with
1070 the library. If this is what you want to do, use the GNU Lesser General
1071 Public License instead of this License. But first, please read
1072 <https://www.gnu.org/licenses/why-not-lgpl.html>.
1080 <h2 class="SECT2"><a name="HISTORY">12.2. History</a></h2>
1081 <p>A long time ago, there was the <span class="APPLICATION">Internet Junkbuster</span>, by Anonymous Coders and
1082 Junkbusters Corporation. This saved many users a lot of pain in the early days of web advertising and user
1084 <p>But the web, its protocols and standards, and with it, the techniques for forcing ads on users, give up
1085 autonomy over their browsing, and for tracking them, keeps evolving. Unfortunately, the <span class=
1086 "APPLICATION">Internet Junkbuster</span> did not. Version 2.0.2, published in 1998, was the last official
1087 release, available from Junkbusters Corporation. Fortunately, it had been released under the GNU <a href=
1088 "https://www.gnu.org/licenses/old-licenses/gpl-2.0.html" target="_top">GPL</a>, which allowed further development
1090 <p>So Stefan Waldherr started maintaining an improved version of the software, to which eventually a number of
1091 people contributed patches. It could already replace banners with a transparent image, and had a first version of
1092 pop-up killing, but it was still very closely based on the original, with all its limitations, such as the lack
1093 of HTTP/1.1 support, flexible per-site configuration, or content modification. The last release from this effort
1094 was version 2.0.2-10, published in 2000.</p>
1095 <p>Then, some <a href="https://www.privoxy.org/user-manual/copyright.html#AUTHORS" target="_top">developers</a>
1096 picked up the thread, and started turning the software inside out, upside down, and then reassembled it, adding
1097 many <a href="https://www.privoxy.org/user-manual/introduction.html#FEATURES" target="_top">new features</a>
1099 <p>The result of this is <span class="APPLICATION">Privoxy</span>, whose first stable version, 3.0, was released
1101 <p>As of 2012 the Junkbusters Corporation's website (http://www.junkbusters.com/) has been shut down, but Privoxy
1102 is still actively maintained.</p>
1105 <h2 class="SECT2"><a name="AUTHORS">12.3. Authors</a></h2>
1106 <p>Current Privoxy Team:</p>
1107 <p class="LITERALLAYOUT"> Fabian Keil, lead developer<br>
1108 David Schmidt<br>
1109 Lee Rian<br>
1110 Roland Rosenfeld<br>
1111 Ian Silvester</p>
1112 <p>Former Privoxy Team Members:</p>
1113 <p class="LITERALLAYOUT"> Johny Agotnes<br>
1114 Rodrigo Barbosa<br>
1115 Moritz Barsnick<br>
1116 Hal Burgiss<br>
1117 Ian Cummings<br>
1118 Brian Dessent<br>
1119 Jon Foster<br>
1120 Karsten Hopp<br>
1121 Alexander Lazic<br>
1122 Daniel Leite<br>
1123 Gábor Lipták<br>
1124 Adam Lock<br>
1125 Guy Laroche<br>
1126 Justin McMurtry<br>
1127 Mark Miller<br>
1128 Gerry Murphy<br>
1129 Andreas Oesterhelt<br>
1130 Haroon Rafique<br>
1131 Georg Sauthoff<br>
1132 Thomas Steudten<br>
1133 Jörg Strohmayer<br>
1134 Rodney Stromlund<br>
1135 Sviatoslav Sviridov<br>
1136 Sarantis Paskalis<br>
1137 Stefan Waldherr</p>
1138 <p>Thanks to the many people who have tested Privoxy, reported bugs, provided patches, made suggestions, donated
1139 or contributed in some other way. These include (in alphabetical order):</p>
1140 <p class="LITERALLAYOUT"> Rustam Abdullaev<br>
1141 Clint Adams<br>
1144 Davide Alberani<br>
1145 Maxim Antonov<br>
1146 Anatoly Arzhnikov<br>
1147 Ken Arromdee<br>
1148 Natxo Asenjo<br>
1149 Devin Bayer<br>
1150 Havard Berland<br>
1151 David Binderman<br>
1152 David Bo<br>
1153 Gergely Bor<br>
1154 Francois Botha<br>
1155 Reiner Buehl<br>
1158 Andrew J. Caines<br>
1159 Clifford Caoile<br>
1160 Edward Carrel<br>
1161 Pak Chan<br>
1162 Wan-Teh Chang<br>
1163 Sam Chen<br>
1164 Ramkumar Chinchani<br>
1165 Billy Crook<br>
1166 Frédéric Crozat<br>
1167 Matthew Daley<br>
1169 Michael T. Davis<br>
1170 Markus Dittrich<br>
1171 Mattes Dolak<br>
1172 Matthias Drochner<br>
1175 Peter E.<br>
1176 Florian Effenberger<br>
1177 Markus Elfring<br>
1178 Ryan Farmer<br>
1179 Matthew Fischer<br>
1180 T Ford<br>
1181 Dean Gaudet<br>
1182 Stephen Gildea<br>
1183 Morton A. Goldberg<br>
1184 John McGowan<br>
1185 Danny Goossen<br>
1186 Lizik Grelier<br>
1187 Daniel Griscom<br>
1188 Felix Gröbert<br>
1189 Bernard Guillot<br>
1190 Jeff H.<br>
1191 Tim H.<br>
1192 Aaron Hamid<br>
1193 Darel Henman<br>
1194 Mathias Homann<br>
1195 Magnus Holmgren<br>
1196 Eric M. Hopper<br>
1197 Ralf Horstmann<br>
1198 Ho+ Ho+ Ho+<br>
1199 Nedžad Hrnjica<br>
1200 Stefan Huehner<br>
1201 Basil Hussain<br>
1202 Peter Hyman<br>
1203 Derek Jennings<br>
1204 Andrew Jones<br>
1205 Julien Joubert<br>
1206 Ralf Jungblut<br>
1207 Petr Kadlec<br>
1208 Kacperdominik<br>
1211 Robert Klemme<br>
1212 Max Khon<br>
1213 Steven Kolins<br>
1215 Stefan Kurtz<br>
1216 Zeno Kugy<br>
1217 David Laight<br>
1218 Bert van Leeuwen<br>
1219 Don Libes<br>
1220 Paul Lieverse<br>
1221 Adele Lime<br>
1222 Han Liu<br>
1223 Toby Lyward<br>
1224 Wil Mahan<br>
1225 Jindrich Makovicka<br>
1226 Raphael Marichez<br>
1227 Francois Marier<br>
1228 Angelina Matson<br>
1230 Jonathan McKenzie<br>
1231 David Mediavilla<br>
1232 Raphael Moll<br>
1233 J. Momberger<br>
1234 Peter Müller<br>
1235 Mathew Murphy<br>
1236 Amuro Namie<br>
1237 Mark Nelson<br>
1238 Nettozahler<br>
1239 Tobias Netzel<br>
1242 John Palkovic<br>
1244 Adam Piggott<br>
1245 Petr Písar<br>
1247 Dan Price<br>
1249 Roberto Ragusa<br>
1251 Félix Rauch<br>
1252 Kai Raven<br>
1253 Marvin Renich<br>
1254 Black Rider<br>
1255 Chris John Riley<br>
1256 Maynard Riley<br>
1257 Ivan Romanov<br>
1258 Andreas Rutkauskas<br>
1261 Bart Schelstraete<br>
1262 Gregory Seidman<br>
1263 Atman Sense<br>
1264 Mark Seward<br>
1265 Franz Schwartau<br>
1266 Chung-chieh Shan<br>
1267 Johan Sintorn<br>
1268 Benjamin C. Wiley Sittler<br>
1269 DRS David Soft<br>
1270 Simon South<br>
1271 Dan Stahlke<br>
1273 Oliver Stoeneberg<br>
1274 Václav Švec<br>
1275 Endre Szabo<br>
1276 Rick Sykes<br>
1278 Spinor S.<br>
1279 Tceverling<br>
1280 Peter Thoenen<br>
1281 Marc Thomas<br>
1282 Martin Thomas<br>
1283 Reuben Thomas<br>
1284 Guybrush Threepwood<br>
1285 Tyrexionibus<br>
1287 Sam Varshavchik<br>
1289 Joel Verhagen<br>
1290 Bobby G. Vinyard<br>
1291 Jochen Voss<br>
1292 David Wagner<br>
1293 Glenn Washburn<br>
1294 Song Weijia<br>
1295 Jörg Weinmann<br>
1296 Darren Wiebe<br>
1297 Anduin Withers<br>
1298 withoutname<br>
1299 Eduard Wulff<br>
1300 Leo Wzukw<br>
1302 Yang Xia<br>
1303 Jarry Xu<br>
1304 Oliver Yeoh<br>
1305 Yossi Zahn<br>
1306 Jamie Zawinski<br>
1308 Radoslaw Zielinski</p>
1309 <p>Privoxy is based in part on code originally developed by Junkbusters Corp. and Anonymous Coders.</p>
1310 <p>Privoxy heavily relies on Philip Hazel's PCRE.</p>
1311 <p>The code to filter compressed content makes use of zlib which is written by Jean-loup Gailly and Mark
1313 <p>On systems that lack strptime(), Privoxy is using the one from the GNU C Library written by Ulrich
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1328 <td width="33%" align="right" valign="top">See Also</td>
projects / privoxy.git / blob