href links are not converted from file.md by hugo

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
(cherry picked from commit ad1819ca1d56a0e2caae2f0f28d14a456686e00b)

docs/userguide/storagedriver/device-mapper-driver.md

@@ -358,7 +358,7 @@ If you run into repeated problems with thin pool, you can use the
 `dm.min_free_space` option to tune the Engine behavior. This value ensures that
 operations fail with a warning when the free space is at or near the minimum.
 For information, see <a
-href="../../../reference/commandline/dockerd.md#storage-driver-options"
+href="../../../reference/commandline/dockerd/#storage-driver-options"
 target="_blank">the storage driver options in the Engine daemon reference</a>.
 
 
@@ -658,4 +658,4 @@ data volumes.
 * [Select a storage driver](selectadriver.md)
 * [AUFS storage driver in practice](aufs-driver.md)
 * [Btrfs storage driver in practice](btrfs-driver.md)
-* [daemon reference](../../reference/commandline/dockerd.md#storage-driver-options)
+* [daemon reference](../../reference/commandline/dockerd/#storage-driver-options)