COPYING: List the known licences in the source tree.

COPYING

@@ -11,6 +11,76 @@ Jonas, or the current maintainer of the day to do the right thing (much
 like it is in the Linux kernel). But this needs to be yet worked out
 and agreed upon.
 
+Other licences apply to some files in the source tree.  The following
+files and their derivatives are not installed by "make install" and
+typically don't appear in binary packages of ELinks, so we do not
+include their complete licence notices in COPYING:
+
+* acinclude.m4: Concatenated from config/m4/*.m4, which see.
+
+* aclocal.m4, config/install-sh: Permissive licences.
+
+* config/config.guess, config/config.sub: GPLv2 or later, plus special
+  exception.
+
+* config/m4/gettext.m4, config/m4/lcmessage.m4, config/m4/progtest.m4:
+  "can be copied and used freely without restrictions".
+
+* config/missing: GPLv2 or later.
+
+* config/mkinstalldirs: Public domain.
+
+* configure: "unlimited permission to copy, distribute and modify"
+  from FSF, but this is also derived from configure.in, which is
+  GPLv2.
+
+* contrib/debian/rules: "GNU copyright 1997 to 1999 by Joey Hess",
+  whatever that means.
+
+* doc/tools/asciidoc/: GPLv2 or later.
+
+* doc/tools/help2xml, po/perl/msgaccel-check,
+  po/perl/msgaccel-prepare: ISC licence.
+
+* po/perl/Locale/PO.pm: "same terms as Perl itself", i.e. GPLv1 or
+  later or Artistic License.
+
+* test/bigtextarea.html: Changing the text of GPLv2 is not allowed,
+  but you could replace that with some other text.
+
+* test/color.html: possibly derived from rgb.txt of X11?
+
+* test/optgroup.html: GNU free documentation licence; see
+  test/GFDL-1.2.
+
+* test/GFDL-1.2: Changing the text of GFDLv1.2 is not allowed.
+
+The following files or their derivatives are installed by "make
+install" or might otherwise be useful to include in binary packages,
+so their full licence terms should be included here in COPYING:
+
+* contrib/conv/mailcap.pl: GPLv2 or later.
+
+* contrib/LinksOS2Icon.zip: Part public domain.
+
+* contrib/links_wps.zip: Part GPLv2 or later.
+
+* COPYING: Changing the text of GPLv2 is not allowed.
+
+* doc/manual.txt: "Hold blameless the authors.  Any lawful use is
+  allowed." which presumably applies to the entire ELinks manual,
+  except the list of features is derived from features.conf, which
+  is GPLv2.
+
+* src/osdep/getifaddrs.c, src/osdep/getifaddrs.h: See "KTH 3-clause
+  BSD-style licences" below.
+
+* src/util/md5.c, Unicode/entities.txt: Public domain.
+
+* src/util/sha1.c, src/util/sha1.h: Mozilla Public License Version 1.1
+  (not later), or GNU General Public License Version 2 or later.
+  ELinks uses these under GPL and does not include the text of the MPL.
+
 -----------------------------------------------------------------------
 
 		    GNU GENERAL PUBLIC LICENSE
@@ -353,3 +423,48 @@ proprietary programs.  If your program is a subroutine library, you may
 consider it more useful to permit linking proprietary applications with the
 library.  If this is what you want to do, use the GNU Library General
 Public License instead of this License.
+
+-----------------------------------------------------------------------
+
+"KTH 3-clause BSD-style licences"
+
+In src/osdep/getifaddrs.c:
+
+ * Copyright (c) 2000 - 2001 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+
+In src/osdep/getifaddrs.h:
+
+ * Copyright (c) 2000 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+
+In both src/osdep/getifaddrs.c and src/osdep/getifaddrs.h:
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.