Clarify lack of failover in Multi-ISP doc

git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@3047 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb

Shorewall-docs2/MultiISP.xml

@@ -15,7 +15,7 @@
       </author>
     </authorgroup>
 
-    <pubdate>2005-11-16</pubdate>
+    <pubdate>2005-11-22</pubdate>
 
     <copyright>
       <year>2005</year>
@@ -316,8 +316,9 @@
       </orderedlist>
 
       <para>That's <emphasis role="bold">all</emphasis> that these entries do.
-      You still have to follow the principle stated at the top of this
-      article:</para>
+      You still have to follow the principle stated in the <ulink
+      url="Shorewall_and_Routing.html">Shorewall Routing
+      documentation</ulink>:</para>
 
       <orderedlist>
         <listitem>
@@ -357,6 +358,15 @@
       </warning>
     </section>
 
+    <section>
+      <title>What an entry in the Providers File Does NOT Do</title>
+
+      <para>Given that Shorewall is simply a tool to configure Netfilter and
+      does not run continuously in your system, entries in the providers file
+      <emphasis role="bold">do not provide any automatic failover in the event
+      of failure of one of your Internet connections</emphasis>.</para>
+    </section>
+
     <section>
       <title>Example</title>