CONFERENCE COMMANDS.
Any text typed while in the conference is sent to all the parties involved.
A header before the text shows its origin.
The header is not repeated if the next text has the same origin.
In the conference, the commands should begin with a semi-colon in the first
column, so as to be interpreted as commands and not text.
Commands in the Conference mode:
;C [PORT] [CALL] :
Connect to a call on a port.
The port indication is optional; the port of the connected user is the default.
;D [CALL]: Disconnects the call from the conference.
;H : Help
;W : Shows a list of the participants in the conference.
;Q : Exit the conference.
