Copyright for bbmail source package in Oracular

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: bbmail
Source: https://sourceforge.net/projects/bbtools
Comment:
 This package was debianized by Brent A. Fulgham bfulgham@debian.org on
 Thu, 27 Oct 1999 20:17:09 -0700.
 .
 It was downloaded from http://bbtools.sourceforge.net
 .
 Upstream Authors: John Kennis

Files: *
Copyright:
 1998, 1999 John Kennis
 1997, 1998, 1999 Brad Hughes
License: GPL-2.0-or-later

Files: debian/*
Copyright: 2022 Boyuan Yang 
License: CC0-1.0

License: CC0-1.0
 On Debian systems, the complete text of the Creative Commons Zero v1.0
 Universal License can be found in "/usr/share/common-licenses/CC0-1.0".

License: GPL-2.0-or-later
 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.
 .
 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.
 .
 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".