Add Extension Scripts to Lenny->Squeeze Article

docs/LennyToSqueeze.xml

@@ -579,6 +579,15 @@ NONAT           loc             -               tcp     80</programlisting>
       file at the last <command>start</command> or
       <command>restart</command>.</para>
     </section>
+
+    <section>
+      <title>Extension Scripts</title>
+
+      <para>If you have entries in Shorewall extension scripts
+      (<filename>/etc/shorewall/init</filename>,
+      <filename>/etc/shorewall/start</filename>, etc.), you should review
+      <ulink url="Shorewall-perl.html#Extensions">this article</ulink>.</para>
+    </section>
   </section>
 
   <section>

docs/Shorewall-perl.xml

@@ -143,7 +143,7 @@
           </itemizedlist>
         </listitem>
 
-        <listitem>
+        <listitem id="Extension">
           <para>With the shell-based compiler, extension scripts were copied
           into the compiled script and executed at run-time. In many cases,
           this approach doesn't work with Shorewall Perl because (almost) the