[Cooker] Exiting DrakConf killing X session again

[Andrej Borsenkow]

I just had the same case again. In this case I called network
configuration, new profile, entered the name of new profile and got empty
right panel. I then pressed "close window" button ... and no more window
and even kdm was dead.

I suspect, that DrakConf actually tried to do something like kill(child,
TERM) - but child was not there, so it just did kill(0, TERM), killing
everything in this group.

-andrej