[aprssig] A test for APRS in some lessor traveled Western areas

[Robert Bruninga]

> > I'll do a test:  WIDE3-1 out and WIDE2-1 
> > back in Nevada and Utah.

Both of these are identical one-hop paths.  They will go no
further than the first digi, because only the final -N is
decremented.  They will be digiopeated once as WIDE3-0 and
WIDE2-0 (displayed as WIDE3 and WIDE2 sice a -0 is usually not
shown) and neither will go any further.

Bob, WB4APR