xdm(1x) on Linux
The text 3d7a7a47b552, as Debian 2.1 (Slink), Debian 2.0 (Hamm) shipped it.
X Display Manager with support for XDMCP, host chooser
Flags it lists
-
-config -
-debug -
-error -
-nodaemon -
-resources -
-server -
-session -
-udpPort -
-xrm