04Jan22=======================================================================
1. Fix issue in the RBN (and probably other places) with callsigns that
contain trailing / in callsigns like: OH0K/6, K2PO/7 etc.
+2. Regard strange callsigns like DR4W-HB (seen in skimmer spots) as invalid.
+ This *should be* something like HB9/DR4W or (spit) DR4W/HB9.
03Jan22=======================================================================
1. Allow overrides (on modern versions of perl) with things in DXVars.pm, such
$clusterport. This is really only of use for people trying to run more than