Copyright for libdebian-installer source package in Xenial

This is a common library for Debian GNU/Linux installer.

Authors: David Whedon 
         Bastian Blank 
         many others

The combined code is copyrighted by:

Copyright © 2001-2002 David Whedon|Kimdon 
Copyright © 2001-2002 Tollef Fog Heen 
Copyright © 2002-2003 Martin Sjogren 
Copyright © 2002 Junichi Uekawa 
Copyright © 2002 Michael Cardenas 
Copyright © 2003-2009 Bastian Blank 
Copyright © 2003-2004 Petter Reinholdtsen 
Copyright © 2003-2004 Petter Reinholdtsen 
Copyright © 2003-2008 Joey Hess 
Copyright © 2004 Matt Kraai 
Copyright © 2004 Alastair McKinstry 
Copyright © 2004-2008 Stephen R. Marenka 
Copyright © 2004-2006 Thiemo Seufer 
Copyright © 2004 Joshua Kwan 
Copyright © 2005 Matt Zimmerman 
Copyright © 2005-2009 Colin Watson 
Copyright © 2006-2009 Martin Michlmayr 
Copyright © 2007 Sven Luther 
Copyright © 2007-2009 Frans Pop 
Copyright © 2008 Aurélien Jarno 
Copyright © 2008 Julien Blache 
Copyright © 2009 Michael Casadevall 

   This package 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.

   This package 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 this program. If not, see 

On Debian systems, the complete text of the GNU General
Public License can be found in `/usr/share/common-licenses/GPL-2'.