xdm-config

[Anton Shterenlikht]

an update of port x11/xdm overwrites user modified configuration,
in particular, xdm-config file, typically /usr/local/lib/X11/xdm/xdm-config

In particular, this line:

! SECURITY: do not listen for XDMCP or Chooser requests
! Comment out this line if you want to manage X terminals with xdm
!DisplayManager.requestPort:    0

becomes uncommented, and all existing connections are cut.

Is it possible to modify this default behaviour, e.g. by
comparing new xdm-config with the existing one, and if they
differ install the new one into xdm-config.new, or something?
Or perhaps ask the user what is to be done about this?
Or at least preserve the existing xdm-config in xdm-config.old
before installing the new file?

Or perhaps I'm missing something very simple?

many thanks
anton

-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
Tel: +44 (0)117 928 8233 
Fax: +44 (0)117 929 4423