Q)uit:  A "Q" command allows you to change where you are in RBBS.
There are four sections:
   MAIN - communications.  Messaging system
   FILE - for exchanging files
   UTIL - other functions, like changing your password
   LIBR - libraries of files
In addition, you can leave RBBS entirely by selecting S)ession.
And you can quit a C)onference to return to the main message base.
