Copyright for apt-setup source package in Trusty

apt-setup is copyright 2005 by Joey Hess ;
             copyright 2005, 2006, 2007, 2008 by Canonical Ltd.

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.

On Debian systems, a copy of the GNU General Public License is available in
/usr/share/common-licenses/GPL.