make vanilla configuration gateways easier to understand for new users

having the same gateway definition bound to the ipv6 and ipv4 external
profiles caused confusion for some new users. Also having a gateway
bound to the internal profile was a bit confusing.
fs-6859

conf/vanilla/sip_profiles/external-ipv6.xml

@@ -2,7 +2,7 @@
   <!-- http://wiki.freeswitch.org/wiki/Sofia_Configuration_Files -->
   <!-- This profile is only for outbound registrations to providers -->
   <gateways>
-    <X-PRE-PROCESS cmd="include" data="external/*.xml"/>
+    <X-PRE-PROCESS cmd="include" data="external-ipv6/*.xml"/>
   </gateways>
 
   <aliases>

conf/vanilla/sip_profiles/external-ipv6/example.xml

@@ -28,10 +28,11 @@
   <!--<param name="caller-id-in-from" value="false"/>-->
   <!--extra sip params to send in the contact-->
   <!--<param name="contact-params" value=""/>-->
-  <!-- Put the extension in the contact -->
-  <!--<param name="extension-in-contact" value="true"/>-->
   <!--send an options ping every x seconds, failure will unregister and/or mark it down-->
   <!--<param name="ping" value="25"/>-->
-  <!--<param name="cid-type" value="rpid"/>-->
   <!--</gateway>-->
+  <!--rfc5626 : Abilitazione rfc5626 ///-->
+  <!--<param name="rfc-5626" value="true"/>-->
+  <!--rfc5626 : extra sip params to send in the contact-->
+  <!--<param name="reg-id" value="1"/>-->
 </include>

conf/vanilla/sip_profiles/internal.xml

@@ -15,7 +15,6 @@
   </aliases>
   <!-- Outbound Registrations -->
   <gateways>
-    <X-PRE-PROCESS cmd="include" data="internal/*.xml"/>
   </gateways>
 
   <domains>