Request for a unix shellscript and lispm server to start up remote X screens?

[dmitchell@backus.trc.amoco.com (Donald H. Mitchell)]

    Date: Tue, 12 Jun 90 11:44 EDT
    From: barmar@Think.COM (Barry Margolin)

     [...]
    Note that the UNIX-REXEC server uses the same criteria as the EVAL
    server: the client host must be trusted, and the Lispm must either be
    logged out or have called NET:EVAL-SERVER-ON.

						    barmar

I can't find any documentation on NET:EVAL-SERVER-ON (not in DocEx index).
What does it do?  How does it relate to NET:REMOTE-LOGIN-ON?  Is it supported
(it is exported from net)?

Once again, barmar wows me with his deep knowledge of these beasts!  His
response will help me as well as the initial author.  I owe him another beer.

don