ZF-10419: add RFC_3339 format to docs

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@23246 44c647ce-9c0f-0410-b52a-842ac1e357ba

documentation/manual/en/module_specs/Zend_Date-Constants.xml

@@ -633,6 +633,13 @@
                     </row>
 
                     <row>
+                        <entry><constant>Zend_Date::RFC_3339</constant></entry>
+                        <entry>Date according to <acronym>RFC</acronym> 3339 (string)</entry>
+                        <entry>2009-02-13T14:53:27+01:00</entry>
+                        <entry><emphasis>2009-02-13T14:53:27+01:00</emphasis></entry>
+                    </row>
+
+                    <row>
                         <entry><constant>Zend_Date::RSS</constant></entry>
                         <entry>Date for <acronym>RSS</acronym> Feeds (string)</entry>
                         <entry>2009-02-13T14:53:27+01:00</entry>