[libvirt] [PATCH] docs: domain: Document network <filterref>

[Cole Robinson]

The proper nwfilter docs go into full detail, but we should still
have a brief bit about domain XML in the domain documentation
---
 docs/formatdomain.html.in | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 9bcef6a..f6ce22d 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -4908,6 +4908,47 @@ qemu-kvm -net nic,model=? /dev/null
       <code><model></code> element is mandatory.
     </p>
 
+    <h5><a name="elementNwfilter">Traffic filtering with NWFilter</a></h5>
+
+    <p>
+    <span class="since">Since 0.8.0</span> an <code>nwfilter</code> profile
+    can be assigned to an interface device, which allows configuring
+    traffic filter rules for the virtual machine.
+
+    See the <a href="formatnwfilter.html">nwfilter</a> documentation for more
+    complete details.
+    </p>
+
+<pre>
+  ...
+  <devices>
+    <interface ...>
+      ...
+      <filterref filter='clean-traffic'/>
+    </interface>
+    <interface ...>
+      ...
+      <filterref filter='myfilter'>
+        <parameter name='IP' value='104.207.129.11'/>
+        <parameter name='IP6_ADDR' value='2001:19f0:300:2102::'/>
+        <parameter name='IP6_MASK' value='64'/>
+        ...
+      </filterref>
+    </interface>
+  </devices>
+  ...</pre>
+
+    <p>
+      The <code><filterref></code> <code>filter</code> attribute
+      specifies the name of the <a href="formatnwfilter.html">nwfilter</a>
+      to use. Optional <code><parameter></code> values may be
+      specified for passing additional info to the nwfilter via the
+      <code>name</code> and <code>value</code> attributes. See
+      the <a href="formatnwfilter.html#nwfconceptsvars">nwfilter</a>
+      docs for info on parameters.
+    </p>
+
+
     <h4><a name="elementsInput">Input devices</a></h4>
 
     <p>
-- 
2.7.3