OZ GMSGS server

[Ian Macky <Ian @ MIT-OZ>]

OK, some changes have been made, for compatability with ITS: GMSGS
opens a full connection, and will accept a filespec in place of a
username.  It takes all the other switches and randomness that the
interactive one does, and sends back all the same output (primary
input and output are just reset to the Chaos JFNs).  One note: There
must be a <space> or <CR> or <LF> or some TWENEX terminating character
after the last field, since the COMND call that is parsing up the
input line does not understand 215's to be EOL (the automatic 8->7bit
character conversion has yet to be implimented, alas).  If there is no
ending terminator, the last field will be missed entirely.