/usr/share/doc/xpdf/copyright is in xpdf 3.04-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0
Source: http://www.foolabs.com/xpdf
Upstream-Name: Xpdf
Files-Excluded:
 *dj*
 misc
 fofi
 *win32.h
 configure
 install-sh
 ms_make.bat
Files: *
Copyright: 1996-2015 Derek B. Noonburg <derekn@foolabs.com>
License: GPL-2+
 Xpdf is licensed under the GNU General Public License (GPL), version
 2.  In my opinion, the GPL is a convoluted, confusing, ambiguous mess.
 But it's also pervasive, and I'm sick of arguing.  And even if it is
 confusing, the basic idea is good.
 .
 In order to cut down on the confusion a little bit, here are some
 informal clarifications:
 .
 - I don't mind if you redistribute xpdf in source and/or binary form,
   as long as you include all of the documentation: README, man pages
   (or help files), and COPYING.  (Note that the README file contains a
   pointer to a web page with the source code.)
 .
 - Selling a CD-ROM that contains xpdf is fine with me, as long as it
   includes the documentation.  I wouldn't mind receiving a sample
   copy, but it's not necessary.
 .
 - If you make useful changes to xpdf, please make the source code
   available -- post it on a web site, email it to me, whatever.
 .
 For information on commercial licensing and consulting, please see the
 Glyph & Cog web site:
 .
     http://www.glyphandcog.com/
 .
 On Debian systems, the full text of the GNU General Public License
 version 2 can be found in the file `/usr/share/common-licenses/GPL-2'.
Files: debian/*
Copyright: 1996-1998 Dirk Eddelbuettel <edd@debian.org>
           1998-2007 Hamish Moffatt <hamish@debian.org>
           2010 Osamu Aoki <osamu@debian.org>
           2010 Rogério Theodoro de Brito <rbrito@ime.usp.br>
           2010-2015 Michael Gilbert <mgilbert@debian.org>
License: GPL-2
 On Debian systems, the full text of the GNU General Public License
 version 2 can be found in the file `/usr/share/common-licenses/GPL-2'.
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