FX.25 support

[svancau]

Hello,

I tought it would be a nice experiment to add FEC (forward error correction) to APRS frames at digipeat.
Modifying hdlc_send and the input of hdlc_deframing seems to me to be the easiest route.
FX.25 only adds some bytes but the frame can still be decoded by any AX25 equipment
spec
Does it seem to be a good approach ?

Cheers,
Sébastien

[wb2osz]

This has been added in the "dev" branch.