I've made some further improvements.

The channel variables page now contains placeholders for all the variables that were missing (approx 119 added).

http://wiki.freeswitch.org/wiki/Channel_Variables

I have also created/updated the following variable documentation pages with the info collected from mod_xml_curl docs

http://wiki.freeswitch.org/wiki/Variable_sip_auth_realm

http://wiki.freeswitch.org/wiki/Variable_sip_auth_username

http://wiki.freeswitch.org/wiki/Variable_sip_auth_method

http://wiki.freeswitch.org/wiki/Variable_sip_user_agent

http://wiki.freeswitch.org/wiki/Variable_sip_request_host

http://wiki.freeswitch.org/wiki/Variable_sip_request_port

http://wiki.freeswitch.org/wiki/Variable_sip_profile

http://wiki.freeswitch.org/wiki/Variable_sip_from_port

http://wiki.freeswitch.org/wiki/Variable_sip_from_user

http://wiki.freeswitch.org/wiki/Variable_sip_from_host

http://wiki.freeswitch.org/wiki/Variable_sip_to_host

http://wiki.freeswitch.org/wiki/Variable_sip_to_port

http://wiki.freeswitch.org/wiki/Variable_sip_to_user

http://wiki.freeswitch.org/wiki/Variable_sip_contact_host

http://wiki.freeswitch.org/wiki/Variable_sip_contact_port

http://wiki.freeswitch.org/wiki/Variable_sip_contact_user

As such, I have also removed the field descriptions from mod_xml_curl and placed the necessary references back to the correct documentation.

Could someone please review this and make sure it's in line with quality/expectations etc.

Cal