Update structure & XML definitions to support <hostdev caps=net>

This updates the definitions and supporting structures in the XML
schema and domain configuration files.

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@freescale.com>

docs/formatdomain.html.in

@@ -2341,6 +2341,15 @@
     <char>/dev/input/event3</char>
   </source>
 </hostdev>
+...
+    </pre>
+
+...
+&lt;hostdev mode='capabilities' type='net'&gt;
+  &lt;source&gt;
+    &lt;interface&gt;eth0&lt;/interface&gt;
+  &lt;/source&gt;
+&lt;/hostdev&gt;
 ...
     </pre>
 
@@ -2349,13 +2358,15 @@
       <dd>The <code>hostdev</code> element is the main container for describing
         host devices. For block/character device passthrough <code>mode</code> is
         always "capabilities" and <code>type</code> is "block" for a block
-        device and "char" for a character device.
+        device, "char" for a character device and "net" for a host network
+        interface.
       </dd>
       <dt><code>source</code></dt>
       <dd>The source element describes the device as seen from the host.
         For block devices, the path to the block device in the host
         OS is provided in the nested "block" element, while for character
-        devices the "char" element is used
+        devices the "char" element is used. For network interfaces, the
+        name of the interface is provided in the "interface" element.
       </dd>
     </dl>
 

docs/schemas/domaincommon.rng

@@ -3002,6 +3002,9 @@
       <group>
         <ref name="hostdevcapsmisc"/>
       </group>
+      <group>
+        <ref name="hostdevcapsnet"/>
+      </group>
     </choice>
   </define>
 
@@ -3062,6 +3065,17 @@
     </element>
   </define>
 
+  <define name="hostdevcapsnet">
+    <attribute name="type">
+      <value>net</value>
+    </attribute>
+    <element name="source">
+      <element name="interface">
+        <ref name="deviceName"/>
+      </element>
+    </element>
+  </define>
+
   <define name="usbproduct">
     <element name="vendor">
       <attribute name="id">