/usr/share/doc/postgresql/copyright is in postgresql 9.5+173ubuntu0.1.
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Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ Upstream-Contact: Debian PostgreSQL Maintainers <firstname.lastname@example.org> Files: * Copyright: 2005-2014 Martin Pitt <email@example.com> 2009 Cyril Bouthors <firstname.lastname@example.org> 2010 Dimitri Fontaine <email@example.com> 2011-2014 Christoph Berg <firstname.lastname@example.org> 2013 Peter Eisentraut <email@example.com> License: GPL-2+ This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. . The full text of the GPL is distributed as in /usr/share/common-licenses/GPL-2 on Debian systems.