Revert "Obtain resolv hosts via Resolv::Hosts::DefaultFileName"
Revert "Obtain resolv hosts via Resolv::Hosts::DefaultFileName"

This reverts commit aa4a7c3ef3bffc739788fee13324fd3645fb0804.

Ungh, resolv.conf vs hosts

marshall-lee/celluloid-io,ioquatix/celluloid-io,kenichi/celluloid-io,dilumn/celluloid-io,celluloid/celluloid-io