docs: switch to using 'id' attribute instead of 'name' for links

The 'name' attribute on <a...> elements is deprecated in favour
of the 'id' attribute which is allowed on any element. HTML5
drops 'name' support entirely.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

docs/drvvbox.html.in

@@ -8,7 +8,7 @@
         from version 2.2 onwards.
     </p>
 
-    <h2><a name="project">Project Links</a></h2>
+    <h2><a id="project">Project Links</a></h2>
 
     <ul>
       <li>
@@ -43,7 +43,7 @@ vbox+ssh://user@example.com/session  (remote access, SSH tunnelled)
         work is completed to get the libvirtd daemon working there.</strong>
     </p>
 
-    <h2><a name="xmlconfig">Example domain XML config</a></h2>
+    <h2><a id="xmlconfig">Example domain XML config</a></h2>
 
 <pre>
 &lt;domain type='vbox'&gt;