vfsx21.patch available - vfs work (expert developers only)

    Oops, here's another update, right after the vfsx20 update :-).
    I had to revert to LK_SHARED locks to LK_EXCLUSIVE due to some
    UFS braindamage in its directory scanning code which was causing
    some memory corruption.

    fetch http://leaf.dragonflybsd.org/~dillon/vfsx21.patch

    I will eventually fix the UFS directory scanning code, but not in
    the current patch set.

						-Matt