Copyright for libnetfilter-acct source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: libnetfilter_acct
Source: https://www.netfilter.org/projects/libnetfilter_acct/

Files: *
Copyright: 2011 Pablo Neira Ayuso 
           2011 Intra2net AG 
License: LGPL-2.1+

Files: debian/*
Copyright: 2012-2016 Laurence J. Lane 
           2014      Andreas Barth 
           2016-2018 Samuel Henrique 
License: LGPL-2.1+

License: LGPL-2.1+
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 .
 This library 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
 Lesser General Public License for more details.
 .
 On Debian systems, the full text of the GNU Lesser General Public
 License version 2.1 can be found in the file
 `/usr/share/common-licenses/LGPL-2.1'.