Cleanup and reword refuel waypoints
- rename Stopover back to CargoStop
- precise some waypoint naming
Cleanup and refine airlift and airassault waypoints
- Drop Off and Pickup now correctly worded
- Helo waypoints now represent LandingZones for pickup and dropoff
Forbid planes from air assault.
Make air assault drop-off non-optional.
There is always a drop-off location for troops.
Add docs explaining what the assault area is.
Add error handling for cargo drop waypoints.
Document some airlift waypoint behavior.
Remove unnecessary refuel waypoint in airlifts.
Remove CTLD logic from Airlift flightplan for AI
Add Ingress Point to AirAssault FlightPlan
Add simulation halt at AirAssault ingress
Remove AirAssault completly from AutoPlanner
Remove unneeded LandRefuel from Airlift
Clarify cargo waypoints for AirLift and AirAssault
