Add doc for maven.ant.compatibility

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@408106 13f79535-47bb-0310-9956-ffa450edef68

ant/xdocs/properties.xml

@@ -66,6 +66,13 @@
             <i>&lt;empty&gt;</i>
           </td>
         </tr>
+        <tr>
+          <td>maven.ant.compatibility</td>
+          <td>Sets the compatibility for the generated script. Valid values are <code>1.5</code> or <code>1.6</code>. With Ant &gt;= 1.6 the user can define a user/password for proxy settings.</td>
+          <td>since 1.2</td>
+          <td>Yes</td>
+          <td>1.6</td>
+        </tr>
         <tr>
           <td>maven.ant.use.properties</td>
           <td>