Given the load ssh encryption entails, the server would serve (my
estimation) less than third of the users it is able to serve now. For
this reason, I think XDMCP makes sense on LAN anyway, despite security
issues. Anyway, we do not use LTSP (for historical reasons: local media
support - there is PXES right now) and the scope of the argument is
larger; for this reason, #49503 is a special case of this issue.

I don't know what rigorous criterion should be made for the permission
to perform system actions; but the local display one seems rather simple
and intuitive.

For the XFCE, I foud about that a day later by an accident (yes, a DoS
on the server) and I think it is hardcoded. I will file a separate bug
for that in a few days.

-- 
XDMCP user is allowed to hibernate the terminal server
https://launchpad.net/bugs/62144

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