The BSD's don't need to umount cleanly when shuttind down, as they have a special kernel service to handle this. As sch, don't error if we don't have fuser

sh/rc-mount.sh

@@ -25,7 +25,11 @@
 
 # Handy function to handle all our unmounting needs
 # mountinfo is a C program to actually find our mounts on our supported OS's
+# We rely on fuser being preset, so if it's not then we don't unmount anything.
+# This isn't a real issue for the BSD's, but it is for Linux.
 do_unmount() {
+	type fuser >/dev/null 2>&1 || return 0
+
 	local cmd="$1" retval=0 retry=
 	local f_opts="-m -c" f_kill="-s " mnt=
 	if [ "${RC_UNAME}" = "Linux" ] ; then