HEADS UP - More system data structure size changes

[Matthew Dillon]

    I had to expand the thread structure a bit so people following
    HEAD need to do a full kernel + modules build when you update
    next.

    Note that the HEAD may be a bit unstable this week, we are
    really pushing a lot of MP work into it.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>