/info set
commands to server are out-of-band:  #$#
commands to the client are: %


Login process:
  When a user logs in, the server sends *** Connected *** or 
  *** Redirecting old connection to this port ***
  Right after this, the client is expected to identify
  itsef:

  Client to server:
      #$# client CLIENTNAME CLIENTVERSION ARCHITECHTURE
      ARCHITECTURE is:  `uname -s`_`uname -r`   and is optional

  Server to client:
      The server sends those only if the client is registered as 
      understanding these commands.  Some commands may be registered 
      and not others.  The client is expected to store this i

      %info_size MAXLINES       : maximum number of lines allowed in 
                                  an info file
      %recip_regexp REGEXP      : a regular expression that can be used 
                                  to parse lines the client gets from the 
                                  user and passes on to the server.  If 
                                  the client matches the regular expression,
                                  that is the intended recipient of the 
                                  message.  It can be used to record a number 
                                  users to whom the user sent messages
      %connected entry          : sent after all initialization has been 
                                  handled, if the users had previously quit
                                  with "bye" (or never entered)
      %connected attach         : sent after all initialization has been
                                  handled, and after any detach-output if 
                                  the user had previously /detach'ed, and 
                                  has auto-review turned on.  Also sent 
                                  when the user redirects a previous 
                                  connection



Receiving messages:
  When a message is sent, the following messages are sent:
   %sender, %sendgroup, %g, header, message-body, %endmsg 
  (Assuming the client supports them)

  %sender SENDERNAME\r\n   : sent just before a private message to 
                             indicate who sent that message.  Spaces 
                             are translated to underscores.  That line
                             should then be discarded (not parsed further, 
                             and not put on the screen.)
  %sendgroup GROUP\r\n     : list of all the recipents of the message, plus
                             the sender of the message, minus the user 
                             (the users who's running the client).  The list
                             is comma delimited, and has spaces translated
                             to underscores.  It is usable directly as a 
                             sender list.  The line should be discarded.
  %g                       : tells the client to ring the bell.  Discard
                             only the "%g" part of the line.  The rest
                             should be put on the screen for the user.
                             This command will have to be replaced soon.


Exporting a file
  Client to server:
    #$# export_file FILENAME [DESTINATION] : sends a file called FILENAME
                                             as an info file for DESTINATION.
                                             If DESTINATION is not specified,
                                             the user's personal info is set.
                                             Client should check the 
                                             %info_size before sending it.
                                             
  Server to client:
    %export_file OKAY | NOT                : if OKAY, we can send the file.
                                             client sends the file, followed
                                             by the word "SAVE".  If NO, the 
                                             request has to be cancelled.

  The client should hold on to any data sent by the user between the 
  #$# export_file an the file itself - otherwise, messages might end up
  in the info file!


Setting the screen size:
  Client to server:
    #$# screen_width SIZE    : tells the user the width of the screen.  
                               The users then uses this value to format 
                               messages for the users.  Must be between
                               40 and 300.
  Server to client:
    %screen_width NOT|OKAY   : agrees or disagrees with the request


Threading:
  There are two methods to do threading.  If a client uses both of them, 
  method #1 "takes priority", that is, it encapsulates the output generated
  by the second method.

Threading 1:
  Client to server:
    #$# delimiters STARTMSG ENDMSG    : from this point on, every command 
                                        the user sends, the server answers
                                        with STARTMSG, the output of the 
                                        command, ENDMSG.
Threading 2:

  Server to client:
    %begin COMMAND [task_id]
    each line generated by that command starts with %command [task_id] OUTPUT
    when the command is finished, server sends %end [task_id]


Features to register:
    connected
    recip_regexp
    sender
    sendgroup
    recip   (deprecated - not a useful feature to have)
    info_size
    leaf.

SAVE