qemu: spice agent-mouse support

spice agent-mouse support

Usage:
  <graphics type='spice'>
    <mouse mode='client'|'server'/>
  <graphics/>

Signed-off-by: Osier Yang <jyang@redhat.com>

docs/formatdomain.html.in

@@ -2851,6 +2851,7 @@ qemu-kvm -net nic,model=? /dev/null
     <image compression='auto_glz'/>
     <streaming mode='filter'/>
     <clipboard copypaste='no'/>
+    <mouse mode='client'/>
   &lt;/graphics&gt;</pre>
             <p>
               Spice supports variable compression settings for audio,
@@ -2883,6 +2884,13 @@ qemu-kvm -net nic,model=? /dev/null
               to <code>no</code>, <span class="since">since
               0.9.3</span>.
             </p>
+            <p>
+              Mouse mode is set by the <code>mouse<code/> element,
+              setting it's <code>mode<code/> attribute to one of
+              <code>server</code> or <code>client</code> ,
+              <span class="since">since 0.9.11</span>. If no mode is
+              specified, the qemu default will be used (client mode).
+            </p>
           </dd>
           <dt><code>"rdp"</code></dt>
           <dd>

docs/schemas/domaincommon.rng

@@ -1826,6 +1826,17 @@
                 <empty/>
               </element>
             </optional>
+            <optional>
+              <element name="mouse">
+                <attribute name="mode">
+                  <choice>
+                    <value>server</value>
+                    <value>client</value>
+                  </choice>
+                </attribute>
+                <empty/>
+              </element>
+            </optional>
           </interleave>
         </group>
         <group>