ddclient plugin: Added cloudflare to checkip providers (#4167)

* ddclient plugin: Added cloudflare to checkip providers

* Use one.one.one.one instead of 1.1.1.1 to prevent IP address before client IP in response.

dns/ddclient/src/opnsense/mvc/app/models/OPNsense/DynDNS/DynDNS.xml

@@ -139,6 +139,7 @@
                     <Default>web_dyndns</Default>
                     <ValidationMessage>An IP service type is required.</ValidationMessage>
                     <OptionValues>
+                        <web_dyndns>cloudflare</web_dyndns>
                         <web_dyndns>dyndns</web_dyndns>
                         <web_freedns>freedns</web_freedns>
                         <web_googledomains>googledomains</web_googledomains>

dns/ddclient/src/opnsense/scripts/ddclient/lib/address.py

@@ -29,6 +29,7 @@ import ipaddress
 
 
 checkip_service_list = {
+  'cloudflare': '%s://one.one.one.one/cdn-cgi/trace',
   'dyndns': '%s://checkip.dyndns.org/',
   'freedns': '%s://freedns.afraid.org/dynamic/check.php',
   'googledomains': '%s://domains.google.com/checkip',