#$EPIC: window_discon.txt,v 1.4 2009/08/13 04:25:48 jnelson Exp $
This sets the window's server to “NOSERV”, which means it is not associated with a server. It will not receive any output unless you xecho to it.
In the past, windows did not have strong associations with their server, and if their server was disconnected, they would jump ship and try to attach themselves to another server. Failing that, they would disassociate themselves from any server. Then you could use reconnect to re-associate it with it's “most recent server”.
All of that nonsense is gone now, and this command does the same thing that window noserv has always done – a window that is disconnected has no server association and will never associate with a server until you do a window server.
This operation first appeared in EPIC4pre1.028.
This operation was unified with window noserv in EPIC5-0.0.2.