callout patch #2 - make callouts per-cpu and MP safe.

    Here is an updated patch.  No bug fixes, just some API changes as
    per discussions with Joerg.

	fetch http://leaf.dragonflybsd.org/~dillon/callout02.patch

    Note: this patch goes back to the original callout_init() API so there
    are fewer files being patched.  If you applied the old patch you must
    be sure to remove/fresh-checkout *all* the files that were touched by
    the old patch before applying this one.

					-Matt