Add DNS director to changes, fix typo

git-svn-id: http://www.varnish-cache.org/svn/branches/2.1@5438 d4fa192b-c00b-0410-8231-f00ffab90ce4

doc/changes-2.1.3-2.1.4.xml

@@ -16,7 +16,13 @@
     <change type="enh">
       <para>We now have updated documentation in the reStructuredText
       format.  Manual pages and reference documentation are both built
-      from this..</para>
+      from this.</para>
+    </change>
+
+    <change type="enh">
+      <para>We now include a DNS director which uses DNS for choosing
+      which backend to route requests to.  Please see the
+      documentation for more details.</para>
     </change>
 
     <change type="bug" ref="758">