FGFS Addon: Basic rewrite to dynamically registering radios

[hbeni]

The Protocol file hard codes up to 4 Radios+2 ADF currently. It would be good to dynamicalize this, so the UDP string is created on the fly.

[hbeni]

~~Currently the string is updated slowly. FRQ changes and PBT are just changing every 5 seconds or so. PTT however works instantly.~~ :heavy_check_mark: fixed.

[hbeni]

It might be cool to update the UDP string just when something changes. This is already partly implemented, however for tied props this does not work. currently we update at the rate set by the settings (same rate as the protocol transmission)

The code part in question is here; but the listener don't seem to fire in most cases: https://github.com/hbeni/fgcom-mumble/blob/2b4a096ffbcf72176f31b60fe012cf04181d1a61/client/fgfs-addon/radios.nas#L69

The update by timer must be disabled for testing the listeners: https://github.com/hbeni/fgcom-mumble/blob/2b4a096ffbcf72176f31b60fe012cf04181d1a61/client/fgfs-addon/addon-main.nas#L109-L110

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edit: asked at the fgfs forums: https://forum.flightgear.org/viewtopic.php?f=30&t=41484&p=412499#p412499

[hbeni]

• Fixed the problem with the listeners/loop
• Made RDF work again

Looks promising with the first tests I made.