SocketAddress::anyAddress should be a method
SocketAddress::anyAddress should be a method

Summary:
Calling getaddrinfo from a static constructor is not the most
reliable thing to do. Stop doing it.

Test Plan: existing tests

Reviewed By: davejwatson@fb.com

Subscribers: dancol, mzlee, shikong, kmdent, fma, bmatheny, benyluo, ranjeeth, folly-diffs@, jsedgwick, yfeldblum

FB internal diff: D1924578

Tasks: 6534662

Signature: t1:1924578:1426718586:d73bc2f001095e66fa77fde9c027af050cc26d2a

fqihangf/proxygen,sssemil/proxygen,KublaikhanGeek/proxygen,LilMeyer/proxygen,luxuan/proxygen,pueril/proxygen,raphaelamorim/proxygen,zhiweicai/proxygen,jgli/proxygen,supriyantomaftuh/proxygen,wrmsr/proxygen,zhenglaizhang/proxygen,chenmoshushi/proxygen,songfj/proxygen,hiproz/proxygen,KublaikhanGeek/proxygen,luxuan/proxygen,raphaelamorim/proxygen,songfj/proxygen,sssemil/proxygen,songfj/proxygen,supriyantomaftuh/proxygen,fqihangf/proxygen,pueril/proxygen,sssemil/proxygen,fqihangf/proxygen,songfj/proxygen,chjp2046/proxygen,jgli/proxygen,hiproz/proxygen,hnutank163/proxygen,LilMeyer/proxygen,hongliangzhao/proxygen,chjp2046/proxygen,chjp2046/proxygen,Werror/proxygen,wrmsr/proxygen,Orvid/proxygen,hnutank163/proxygen,pueril/proxygen,Werror/proxygen,hiproz/proxygen,fqihangf/proxygen,chenmoshushi/proxygen,LilMeyer/proxygen,supriyantomaftuh/proxygen,zhiweicai/proxygen,Werror/proxygen,zhenglaizhang/proxygen,LilMeyer/proxygen,chenmoshushi/proxygen,raphaelamorim/proxygen,zhenglaizhang/proxygen,wrmsr/proxygen,hongliangzhao/proxygen,hiproz/proxygen,zhenglaizhang/proxygen,hongliangzhao/proxygen,KublaikhanGeek/proxygen,zhiweicai/proxygen,chjp2046/proxygen,hnutank163/proxygen,Orvid/proxygen,pueril/proxygen,chenmoshushi/proxygen,hnutank163/proxygen,jgli/proxygen,Werror/proxygen,Orvid/proxygen,luxuan/proxygen,KublaikhanGeek/proxygen,sssemil/proxygen,wrmsr/proxygen,zhiweicai/proxygen,hongliangzhao/proxygen,raphaelamorim/proxygen,jgli/proxygen,supriyantomaftuh/proxygen,Orvid/proxygen