clarify

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@11637 d0543943-73ff-0310-b7d9-9358b9ac24b2

conf/directory/default/brian.xml

 <include>
-  <!-- ipauth if you have an ip= in the user attributes ie ip="1.2.3.4"  -->
-  <!-- <user id="brian" ip="1.2.3.4"> -->
+  <!--
+      ipauth if you have an cidr= in the user attributes ie cidr="1.2.3.4/32"  
+      see <node type="allow" domain="$${domain}"/> in default acl.conf.xml 
+  -->
   <user id="brian" mailbox="9999" cidr="192.0.2.0/24">
     <!-- Outbound Registrations Related to this user -->
     <gateways>