FlightGear - Flight Simulator FGAddon

BN-2: multiplayer fixes.

* Advertise the full path of the model in /sim/model/path.
* Do not pollute the property trees of other aircraft over multiplayer. All properties
except /sim/view/* must be relative to this aircraft.

Trunk: MD-12: Quick patch

2024.1: MD-12: Quick patch

Trunk: Initial upload MD-12

Trunk: New folder

2024.1: Initial upload MD-12

2024.1: Make new folder

707: make the directional gyros work again in flightgear 2024.1.

Flightgear has changed the way heading indicators are electrically powered. The 707
used to use /systems/electrical/outputs/DG to power the two fluxgate heading indicators.
Use /systems/electrical/outputs/heading-indicator-fg instead. Before this change,
the directional gyros would always indicate the aircraft pointing due north, and be
unusable.

Directional gyros, as opposed to flux gates, would require additional work in
instrumentation.xml, to use heading-indicator-dg with appropriate parameters instead of
heading-indicator-fg.

See:
https://wiki.flightgear.org/Instrumentation#Heading_Indicator_(Directional_Gyro)
https://wiki.flightgear.org/Instrumentation#Heading_Indicator_(Electric_Flux-Gate_Compass)

2020.3: MD-11: Out of band patch

Trunk: MD-11: Sound: Fix exterior reverser mistake