Copyright for xcompmgr source package in Bullseye

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: xcompmgr
Upstream-Contact: Keith Packard 
Source: https://cgit.freedesktop.org/xorg/app/xcompmgr/

Files: *
Copyright: 2003, Keith Packard 
 2003, Matthew Hawn 
License: XFree86

Files: debian/*
Copyright: 2013, Alessandro Ghedini 
License: XFree86

License: XFree86
 Permission to use, copy, modify, distribute, and sell this software and its
 documentation for any purpose is hereby granted without fee, provided that
 the above copyright notice appear in all copies and that both that copyright
 notice and this permission notice appear in supporting documentation, and that
 the name of Keith Packard not be used in advertising or publicity pertaining
 to distribution of the software without specific, written prior permission.
 Keith Packard makes no representations about the suitability of this software
 for any purpose.  It is provided "as is" without express or implied warranty.
 .
 KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL KEITH
 PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
 DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.