Copyright for usrmerge source package in Yangtze V1.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: usrmerge
Source: 
#
# Please double check copyright with the licensecheck(1) command.

Files:     TODO
           development/check-contents
           development/library_paths
           development/test
Copyright: __NO_COPYRIGHT_NOR_LICENSE__
License:   __NO_COPYRIGHT_NOR_LICENSE__

Files:     convert-etc-shells
           convert-usrmerge
Copyright: 2014-2022 Marco d'Itri 
License:   GPL-2.0+
 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 2 of the License, or
 (at your option) any later version.
 .
 On Debian systems, the complete text of the GNU General Public License
 Version 2 can be found in `/usr/share/common-licenses/GPL-2'.

#----------------------------------------------------------------------------
# Files marked as NO_LICENSE_TEXT_FOUND may be covered by the following
# license/copyright files.