Bug#908796: udev (with sysvinit) fails to find devices at boot

[Trek]

Version: 240-2

after upgrading from 239-13 to 240-2, the VGA card is no more
recognized on my system, but adding a small sleep fixes the problem

if dpkg will not be updated with the new sd-notify interface, I think
it would be better to rollback the #791944 patch: the system will not
shutdown correctly with cryptsetup, but at least it can boot (with and
without cryptsetup)

I can prepare a patch if needed

ciao!