How to make that 4.4.0 xdm automatically logins as some user?

From: Gintas (gntrs_at_hotmail.com)
Date: 06/26/04


Date: 26 Jun 2004 13:50:54 -0700

How to make that xdm automatically logins as some user and there is no
need to type user name? This is the case then the password in
/etc/passwd is disabled and only local Xserver is called.

Gintas