Copyright for partman-auto-loop source package in Xenial

partman-auto-loop was written by Colin Watson ,
based on work done on partman-auto and partman-auto-lvm by Anton
Zinoviev and others in the d-i team.

Copyright (C) 2007 Canonical Ltd.

  partman-auto-loop 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, or (at
  your option) any later version.

  partman-auto-loop is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with partman-auto-loop; see the file COPYING.  If not, write to
  the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.

A copy of the GNU General Public License is available in
/usr/share/common-licenses/GPL-2.