1. Fix autoyaw to 0 attitude on takeoff post launch.
2. An error condition abort now properly disarms and continues to contrain thrust and stabi during disarmed state.
3. Increase thrustdown time from 2 to 5 seconds on an error condition (e.g. if 3 m deviation from takeoff position on NE).
On landing stausvtolland state of DISARMED, armhandler now detects this and disarms by force equivalent to a pathplanner alarm trigger.
To re-arm, one must leave the land flight mode.
Add sanity checks to protect from waypoint looping inpath planner.
If takeoff initiated and thrust > vtol_min, enter position hold, reflect copletion in pathstatus, and pathplanner will move to next waypoint in a very short period of time.
