Pull up following revision(s) (requested by tsutsui in ticket #1060):
sys/ufs/ext2fs/ext2fs_vfsops.c: revision 1.146
Pull a fix for mount function from ffs_vfsops.c rev1.186:
Change ffs_mount, in MNT_UPDATE case, to check dev_t's for equality
instead of just vnode pointers.  Fixes erroneous "does not match mounted
device" errors from mount(8) in the presence of MFS /dev, init.root, &c.

(snj)