Back out v1.57, the underlying problem that caused a delay between

mdconfig and the device name appearing in /dev seems to be fixed.

release/scripts/doFS.sh

@@ -64,8 +64,6 @@ dofs_md () {
 	fi
 
 	MDDEVICE=`mdconfig -a -t vnode -f ${FSIMG}`
-	# XXX - This sleep is needed to solve some sort of race condition
-	sleep 5
 	if [ ! -c /dev/${MDDEVICE} ] ; then
 		echo "No /dev/$MDDEVICE" 1>&2
 		exit 1