i've made a lot of changes in the way various things
in the system are queued.  This should only affect ports:
	(1) if their boot() routine was copied from
		the i386 (HI PHIL!  8-)
	(2) if they have funky devices, that require lots
		of in-driver queueing.

note that the driver queues in the buffer struct, b_actf and b_actb,
have *NOT* yet been converted, because of the hassle that would
cause; that'll happen later.


chris

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