anchor.diff:        affect the sip authentication.  Please review conf/directory/default.xml for more
         information on this topic.
     -->
  -  <X-PRE-PROCESS cmd="set" data="domain=${{local_ip_v4}}"/>
  +  <X-PRE-PROCESS cmd="set" data="domain=$${local_ip_v4}"/>
     <X-PRE-PROCESS cmd="set" data="domain_name=$${domain}"/>
     <X-PRE-PROCESS cmd="set" data="hold_music=local_stream://moh"/>
     <X-PRE-PROCESS cmd="set" data="use_profile=internal"/>
  
positive.code:        If unspecified, the bind_server_ip value is used.
         Used by: sofia.conf.xml dingaling.conf.xml
    -->
    <X-PRE-PROCESS cmd="set" data="external_rtp_ip=${{external_ip}}"/>
  
    <!-- external_sip_ip
        Used as the public IP address for SDP.
  
negative.code:        use different addresses where this variable appears.
         Used by: dingaling.conf.xml
    -->
    <X-PRE-PROCESS cmd="set" data="bind_server_ip=$${local_ip_v4}"/>
  
    <!-- NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE
         
  