some small patches

[Julian Elischer]

Here are two small patches they are pretty non-controversial in my
opinion.

they are part of a bigger patch, but I'd like to get them in separatly
to simplify the bigger one.
the first patch:
http://www.freebsd.org/~julian/IDLETD.diff
moves the flag that identifies a thread as being one of the idle threads
from the KSE to the thread. The code that wants to know already
has a thread pointer, but not the KSE pointer so this makes more sense.


The second patch:
http://www.freebsd.org/~julian/sched_clock.diff
makes the sched_ API entrypoint sched_clock()
take a thread argument instead of a KSE.
Once again, the callers have the thread pointer and not the KSE pointer,
and in fact they probably should not have the KSE pointer.


anyone object to these patches?