FIx some bugs in computing turnExitPos for fly-over waypoints,
and computing leg course when preceeeding leg is a runway.
In both cass we had an incorrect turnExitPos, so points along
the leg were incorreclty positioned.
Extend the test cases to cover this further.
Make the max-flyBy angle configuable, since for exmaple AIrbus uses 90
degrees. Expose this via a new gps/config property, and extend the tests
to verify that angles greater than the fly-by angle behav as fly-over
waypoints.
Extend the RoutePath code to share this configuration, so that route
visualisations match the configured angle.
SF-ID: https://sourceforge.net/p/flightgear/codetickets/2694/
Add a bool flag isRoute to flight-plan, and use it to model
routes (which contain VIAs) from plans/legs, which do not.
Default isRoute to false, so most users only see expanded
Vias, and hence something that can be flown directly.
Allow making the AP source indirect (via a string property),
so that the actual source property can be configured or
adjusted from a -set.xml, or at runtime.
Improve argument parsing for createViaTo, createViaFromTo to
handle Airway ghosts as well as strings. As part of this, allow
specification of the airway level explicitly when looking
up an airway.
SF-ID: https://sourceforge.net/p/flightgear/codetickets/2686/
* Relax runway exit route requirement to 80°
* Ensure parking is only reset if airport for AI aircraft has changed
* Heading Error signed and arrival lead distance
Reject invalid frequencies from apt.dat in the loader, and fix
25Khz encoding to be the exact value (i.e round frequencies ending
in 20 and 70 to 25 and 75)
Fix ATCdialog to show 3 digits of comm radio frequency at all times,
and remove its rounding-conversion.
Finally, expand the tests to capture the new behaviour. Test for
EPLL is disabled for now because it contains an invalid frequency.
