Activates when commands are performed in the room.
Does not work for God and above.
Numeric Arg : not used.
Argument : text which must be part of the command typed to filter out
uninteresting commands.
If 0 is returned by the trigger, character will receive the same message as
if the trigger did not exist, and any other command triggers will be checked.
Variables:
%actor% - the character issuing the command.
%cmd% - the exact command (without arguments) issued.
%arg% - the arguments, if any, following the command.
%self% - the room.
Example: TSTAT 52