Support ipv6 embedded addresses in private / public IP classifier
Support ipv6 embedded addresses in private / public IP classifier

Production hosts running iojs return ipv6 addresses for socket.remoteAddress.
Those are typically derived from ipv4 addresses, so can be matched with a
simple extension to the ipv4 regexp.

Krenair/restbase,cscott/restbase,Pchelolo/restbase,eevans/restbase,eevans/restbase,gwicke/restbase,d00rman/restbase,milimetric/restbase,physikerwelt/restbase,milimetric/restbase,inverno/restbase,Pchelolo/restbase,wikimedia/mediawiki-services-restbase,physikerwelt/restbase,gwicke/restbase,Krenair/restbase,inverno/restbase,cscott/restbase,wikimedia/hyperswitch,d00rman/restbase,wikimedia/restbase,wikimedia/mediawiki-services-restbase,wikimedia/restbase