Fixes user rights in log folder and introduces a common jitsi group.
Fixes user rights in log folder and introduces a common jitsi group.

bhatvv/jigasi,jitsi/jigasi,martin7890/jigasi,marclaporte/jigasi,jitsi/jigasi,bhatvv/jigasi,marclaporte/jigasi,martin7890/jigasi