Copyright for gifsicle source package in Bullseye

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: gifsicle
Upstream-Contact: Eddie Kohler 
Source: http://www.lcdf.org/gifsicle/

Files: *
Copyright: 1997-2019, Eddie Kohler 
License: GPL-2 or special

Files: test/testie
Copyright: 2002-2003, International Computer Science Institute
           2004-2007, Regents of the University of California
           2008-2010, Meraki, Inc.
           ?,         Eddie Kohler 
License: GPL-2 or special

Files: include/lcdf/clp.h
       src/clp.c
Copyright: 1997-2017 Eddie Kohler 
License: GPL-2 or CLICK or special

Files: debian/*
Copyright: 2000-2001,      Eduardo Marcel Macan 
           2005-2012,      Gürkan Sengün 
           2006,           Amaya Rodrigo
           2013-2014,      Francois Marier 
           2015-2019,      Herbert Parentes Fortes Neto 
License: GPL-2

License: GPL-2
 This package 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, version 2 of the License.
 .
 This package 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.
 .
 You should have received a copy of the GNU General Public License
 along with this program. If not, see 
 .
 On Debian systems, the complete text of the GNU General
 Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".

License: CLICK
 CLP is free software. It is distributed under the GNU General Public
 License, Version 2, or, alternatively and at your discretion, under the
 more permissive (BSD-like) Click LICENSE file as described below.
 .
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the
 "Software"), to deal in the Software without restriction, subject to the
 conditions listed in the Click LICENSE file, which is available in full at
 http://github.com/kohler/click/blob/master/LICENSE. The conditions
 include: you must preserve this copyright notice, and you cannot mention
 the copyright holders in advertising related to the Software without
 their permission. The Software is provided WITHOUT ANY WARRANTY, EXPRESS
 OR IMPLIED. This notice is a summary of the Click LICENSE file; the
 license in that file is binding.

License: special
 The following alternative license may be used at your discretion.
 .
 Permission is granted to copy, distribute, or alter Gifsicle, whole or
 in part, as long as source code copyright notices are kept intact,
 with the following restriction: Developers or distributors who plan to
 use Gifsicle code, whole or in part, in a product whose source code
 will not be made available to the end user -- more precisely, in a
 context which would violate the GPL -- MUST contact the author and
 obtain permission before doing so.