Copyright for patch source package in Focal

This is Debian's prepackaged version of patch, Larry Wall's program that
allows you to apply diffs to a file automagically.

The current maintainer for this package is Laszlo Boszormenyi (GCS)
.

Previous maintainers were Bill Mitchell ,
Darren Stalder , Adrian Bunk ,
Michael Fedrowitz  and Christoph Berg .

The upstream source is available at 'ftp://ftp.gnu.org/gnu/patch/', resp.
'ftp://alpha.gnu.org/gnu/diffutils/'.

Upstream Maintainer: Paul Eggert 

Copyright:

   Copyright (C) 1984, 1985, 1986, 1987, 1988 Larry Wall
   Copyright (C) 1989-2012 Free Software Foundation, Inc.

   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 3 of the License, or
   (at your option) any later version.

   This program 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.

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