SEC-455: Added note on including taglib declaration in JSPs.

src/docbkx/springsecurity.xml

@@ -1404,7 +1404,14 @@ if (obj instanceof UserDetails) {
 
         <para>Now that you've configured the tag libraries, refer to the
         individual reference guide sections for details on how to use
-        them.</para>
+        them. Note that when using the tags, you should include the
+        taglib reference in your JSP:
+        <programlisting><![CDATA[
+            <%@ taglib prefix='authz' uri='http://acegisecurity.org/authz' %>
+            ]]>
+        </programlisting>
+
+        </para>
       </sect1>
     </chapter>
   </part>