[aprssig] APRS via PCSAT-1 soon!

[Bill Vodall WA7NWP]

This is all built into DIGI_NED and tweaking the format for the D710
shouldn't be hard.   If I know the 'NED' folks, it might already be in
development...

> Great thanks!  It would be great to have the APRSData functions we know and
> love in Xastir with auto update KEPs, etc.  The APRSData program lacks a
> little on Internet connectivity for keps is the only problem I have had with
> it, but we still use it in Michigan for the SATs and other APRS Data.