+04Feb23=======================================================================
+1. Fixed sh/log so that callsigns beginning with a digit (or several) are
+ printed rather than being ignored.
+ This affects: show/ann, chat, log, rcmd and wx
03Feb23=======================================================================
1. Fix is_ipaddr to accept trailing '::' on IPV6 addresses.
2. Fix and extend the TEST program 'showdx' so that it now works on the mojo