DragonFly-2.1.1.481.g0970c master etc/pam.d xdm

[Thomas Nikolajsen]

>Comment out the session line for PAM's xdm config.  This works around
>a widely known bug in xdm where a PAM callback can cause xdm to access
>a bogus widget pointer after the widget has been destroyed.

A little heads up:
This will need manual installing, if host upgraded in window between
pavalos pam.d auto update, Jan 25, 2009, and this Feb 1, 2009.

 -thomas