freeswitch-stable: init script update

- Use "-nc -nf" always. When started by procd freeswitch detects the
  console to be orphaned and disables it. So disable the interactive
  console but force freeswitch to not fork into background.
- Improve readability of command parameters.
- Minor changes.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>