Copyright for wolf4sdl source package in Sid

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Wolf4SDL
Source: https://github.com/fabiangreffrath/wolf4sdl
Comment: This package is in the contrib section, because it requires non-free
 game data to operate that cannot be distributed by Debian. However, current
 releases of `game-data-packager' are able to generate suitable data packages
 from the game as sold by e.g. Steam or GOG.com.

Files: *
Copyright: © 1992 Id Software, Inc.
License: GPL-2.0+
Comment:
 From: John Carmack 
 To: Fabian Greffrath 
 Subject: Re: License of Wolf3d source code
 Date: Thu, 1 Sep 2011 14:08:38 +0000
 .
 Yes, we relicensed it under the gpl years ago.
 .
 Sent from my iPad
 .
 On Sep 1, 2011, at 2:57 AM, "Fabian Greffrath"  wrote=
 :
 .
 > Dear Mr. Carmack,
 >=20
 > I have just recently found out that you have released a Wolf3d app for th=
 e Apple iphone and also released its source code under the terms of the GNU=
  GPL. My question is, does this also apply to the original wolf3d source co=
 de that is distributed in the wolfsrc.zip file from 1996?
 >=20
 > With its current license, the source code is not redistributable by Linux=
  distributions like e.g. Debian. This is a pity, because many people still =
 like to play the game or one of its numerous open source ports.
 >=20
 > so could you please you give confirmation that the original wolf3d source=
  code is relicensed under the terms of the GNU GPL?
 >=20
 > Best regards,
 > Fabian Greffrath

Files: dosbox/*
Copyright: © 2002-2010, The DOSBox Team
License: GPL-2.0+

Files: debian/*
Copyright: © 2010-2023, Fabian Greffrath 
License: GPL-2.0+

License: GPL-2.0+
 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; either version 2 of the License, or
 (at your option) any later version.
 .
 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".