Created osmocom user & group during package installation.
Fix the configuration dir/files permission to match.
Related: OS#4107
Tweaked-By: Oliver Smith <osmith@sysmocom.de>
Change-Id: I625c993ab03dfe32976c651acca9c35c33a768e7
Remove OpenSUSE bug report link, set version to @VERSION@, make it build
with CentOS 8 etc.
Related: OS#4550
Change-Id: I38f80d0f867a2bbaa09b5a42cad5028f23a8effa