Copyright for xwpe source package in Sid

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Xwpe-Alpha
Upstream-Contact: Dennis Payne 
Source: http://www.identicalsoftware.com/xwpe/

Files: *
Copyright: 1993 Fred Kruse
           1997 Dennis Payne
           2002-2020 Francesco Paolo Lovergine 
License: GPL-2
 xwpe is free; anyone may redistribute copies of xwpe to anyone
 under the terms stated in the GNU General Public License. The
 author assumes no responsibility for errors or omissions or
 damages resulting from the use of xwpe.
 .
 On Debian systems the complete text of the GNU General Public License
 can be found in "/usr/share/common-licenses/GPL-2".