docs: Document filesystem type='block' for LXC

Commit 77791dc0e allows LXC to use a host block device as a guest
filesystem, but it isn't documented yet.

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 95d33c0baa13e18282ec963c5a1cb3c618467352..dc6b1526c7451689ef42d0b84dca081ffd936b6f 100644 (file)
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1196,7 +1196,9 @@
         </dd>
         <dt><code>type='block'</code></dt>
         <dd>
-        Currently unused.
+        A host block device to mount in the guest. The filesystem
+        format will be autodetected. Only used by LXC driver
+        <span class="since">(since 0.9.5)</span>.
         </dd>
         </dl>