ULE/SCHED_SMP diff for 7.0

http://people.freebsd.org/~jeff/ule.diff

This patch is scheduled for inclusion in 7.0.  I would like anyone who 
cares to run it to validate that it does not create any stability or 
performance regression over the existing ULE.  This patch replaces ULE 
with SCHED_SMP, which will now no longer exist as a seperate fork of ULE.

Briefly, this is still a very suitable scheduler for uniprocessor machines 
while providing stronger affinity and other performance improvements for 
multiprocessor machines.

Even "works for me!" type responses are welcome so I know roughly how many 
people have tested before I commit this close to release.

Thanks!
Jeff