Bug#290916: confirmation of patch "functionality"

[Václav Šmilauer]

The patch sent lastly proves to be functional. I know it is a bit
violent method and a hack, but it works perfectly. We have about every
other day SIGKILL in gdm debug log.

I put it here for reference for others who might experience the same
problem as _temporary_ solution. The cause (gdm daemon waiting
possibly infinitely for its child to exit after multiple SIGTERMs,
being blocked for logins for that whole time) remains: sleep(10) in the
code.

Regards, Vaclav