Add ACL info to Squid documenation

git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@1932 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb

Shorewall-docs2/Shorewall_Squid_Usage.xml

@@ -62,8 +62,8 @@
         </listitem>
 
         <listitem>
-          <para>Other Squid configuration are usually required required. These
-          changes typically consist of:</para>
+          <para>Depending on your distribution, other Squid configuration
+          changes may be required. These changes typically consist of:</para>
 
           <orderedlist>
             <listitem>
@@ -87,6 +87,10 @@
           <para>See your distribution's Squid documenation and <ulink
           url="http://www.squid-cache.org/">http://www.squid-cache.org/</ulink>
           for details.</para>
+
+          <para>It is a good idea to get Squid working as a <link
+          linkend="Manual">manual proxy</link> first before you try
+          transparent proxying.</para>
         </listitem>
 
         <listitem>
@@ -337,7 +341,7 @@ chkconfig --level 35 iptables on</command></programlisting>
     </section>
   </section>
 
-  <section>
+  <section id="Manual">
     <title>Squid as a Manual Proxy</title>
 
     <para>Assume that Squid is running in zone SZ and listening on port SP;