add secondary google dns ip and 2 failover DYN DNS public dns ips, and t...

add secondary google dns ip and 2 failover DYN DNS public dns ips, and timeouts
its a free public service like google (also faster in europe than opendns) ... more importantly its a failover for occasions when google dns is inaccessible which in cloud hosting can be a very real problem (mix of issues specific to GoogleDNS) so NGINX will try 8888, then 8844 then go on top opendns