Instead of the trigger file and killing mpv, we loop the ring
indefinitely until killed. Maybe we should still got a guardrail but I
still never needed it (modemmonitor would trigger missed_call late or
later ?)
Signed-off-by: Stacy Harper <contact@stacyharper.net>
Signed-off-by: Maarten van Gompel <proycon@anaproy.nl>