Stand 03.12.2018 eingestellte Failsafe Modes:

Failsafe changes:
  * Battery level 10% for failsafe (COM_LOW_BAT_ACT)

Geofencing:
  * max 3000 meter vertical distance (GF_MAX_HOR_DIST)
  * max 200 meter height (GF_MAX_VER_DIST)
  * Return to Land on break, landing after 300s (GF_ACTION, RTL_LAND_DELAY)