Copyright for fai source package in Bullseye

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/

Files: *
Copyright: 1999-2021 Thomas Lange 
License: GPL-2+
Comment:
    Other contributions copyright by
    Thomas Gebhardt         
    Henning Glawe           
    Michael Goetze          
    Kerim Güney             
    Jonas Hoffmann          
    Christian Kern          
    Holger Levsen           
    Darshaka Pathirana      
    Michael Tautschnig      
    Ingo Wichmann           

License: GPL-2+
  The full text of the GPL is distributed as in
  /usr/share/common-licenses/GPL-2 on Debian systems.