+24Mar23=======================================================================
+1. Restore perl regex version of is_ipaddr. This *should* allow windows
+ updates to work again.
+2. Added cmd entry rate limiting. If a user sends X commmands in Y secs then
+ they are disconnected without notice. The defaults are X
+ ($DXCommandmode::maxcmdcount) = 16 and Y ($DXCommandmode::cmdinterval) = 9.
+
+ These can be changed by the startup script.
+
+ These default values are set generously deliberately to allow certain user
+ programs to get with the program and reduce the number of cmds that they
+ issue on connection down to something reasonable. For instance, I cannot
+ see why things like name, qth, lat/long/QRA (amongst several other sticky
+ user attributes that only need to be entered once) are sent on every login.
+
+ These default values WILL reduce over time.