Copyright for libevent-perl source package in Xenial

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Event
Upstream-Contact: Joshua N. Pritikin 
Source: https://metacpan.org/release/Event

Files: *
Copyright: 1998-2004, Joshua N. Pritikin 
 1997, Joshua Nathaniel Pritikin & Graham Barr
License: Artistic or GPL-1+

Files: ppport.h
Copyright: 1999, Kenneth Albanowski
License: Artistic or GPL-1+

Files: debian/*
Copyright: 2002-2005, Steve Kowalik 
 2008-2014, gregor herrmann 
 2008, Rene Mayorga 
 2009, Nathan Handler 
 2011, Alessandro Ghedini 
 2015, Lucas Kanashiro 
License: Artistic or GPL-1+

License: Artistic
 This program is free software; you can redistribute it and/or modify
 it under the terms of the Artistic License, which comes with Perl.
 .
 On Debian systems, the complete text of the Artistic License
 can be found in `/usr/share/common-licenses/Artistic'

License: GPL-1+
 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 1, or (at your option)
 any later version.
 .
 On Debian systems, the complete text of the GNU General
 Public License can be found in `/usr/share/common-licenses/GPL-1'