[aprssig] TEMPn-N and callsign digipeating

[wa7nwp at jnos.org]

> 3) USING APRS MENU, set UIDIGI to WIDE1-1


My D700 call is WA7NWP-7

I set UIDIGI to WIDE1-1,WA7NWP-6

It did indeed digi on -6 and not on -7.  But...  it still used wa7nwp-7
for callsign substitution, which makes sense.  It does confirm that it's
necessary to use the same call in UIDIGI as the MYCALL if it's going to be
used as a point to point digi.

Bill