tools/license-detector: generalize LGPL-2.1-only detection a bit

Marcel Telka

2022-11-17 4b94b01c8eb06af0f410d085771d2324f58f3712

tools/license-detector: generalize LGPL-2.1-only detection a bit

 tools/licenses/LGPL-2.1-only

@@ -1,3 +1,5 @@
# sed -n
# -e '/^Copyright (C) 1991, 1999 Free Software Foundation, Inc\./,/IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW/p'
                  GNU LESSER GENERAL PUBLIC LICENSE
                       Version 2.1, February 1999