Allow optional use of the GTP kernel module. Related: OS#3208 Change-Id: Ic001ec6c5ec9887706a5b27f2a48cd61942ab4ee
Remove OpenSUSE bug report link, set version to @VERSION@, make it build with CentOS 8 etc. Related: OS#4550 Change-Id: Iba04d5c7b9beee80baca83063f9cb2cd533a0003