[aprssig] APRS TO-CALL Registrations

[Robert Bruninga]

At the request of DG8NGN, I have added a number of APRS TOCALL's for DSTAR
aps.
Here is the entire APDxxx series as it stands now.  These are maintained
on:
http://aprs.org/aprs11/tocalls.txt     Bob, WB4aPR

APD4xx  UP4DAR platform
APDDxx  DV-RPTR Modem and Control Center Software
APDFxx  Automatic DF units
APDGxx  D-Star Gateways by G4KLX ircDDB
APDHxx  WinDV (DUTCH*Star DV Node for Windows)
APDInn  DIXPRS - Bela, HA5DI
APDKxx  KI4LKF g2_ircddb Dstar gateway software
APDOxx  ON8JL Standalone DStar Node
APDPRS  D-Star originated posits
APDRxx  APrsDRoid replaces old APAND1.
APDSXX  SP9UOB for dsDigi and ds-tracker
APDTxx  APRStouch Tone (DTMF)
APDUxx  U2APRS by JA7UDE
APDWxx  DireWolf, WB2OSZ