2.4 to 2.6.  PLR and delays (the two schedulers we need) seem to be working
nicely, but need more testing.  Note that the iptables patch isn't tested yet,
but it's the right one to apply...  There is still a locking bug in the PLR
sched, but it only affects stats dumping so we don't care at the moment.

The two imq patches are from the linux imq project, like the old ones.