receive_snoop - catch incoming snoop text
void receive_snoop( string message) ;
If RECEIVE_SNOOP is defined in options.h, whenever a user is snooping another user, all snoop text is sent to receive_snoop() in his user object. Inside of this function, you can do as you wish with the text. A common activity would be to receive() it.
catch_tell(4), receive(3), receive_message(4)