Remove buybox package dependencies

webif/lib/bin/reboot

@@ -107,7 +107,12 @@ killall udhcpc
 
 # Unmount disks
 /bin/sync
-mount | grep '^/dev/sd' | awk '{print $1}' | xargs umount -l
+mount | grep '^/dev/sd' | 
+	{ lastdev=
+	  while read -r dev _; do
+		[ "${lastdev:-}" = "$dev" ] && continue
+		umount -l "$dev"; lastdev=$dev
+	done; }
 
 # Stop device
 for f in /sys/block/sd?; do