better var names, fix broken whitelist logic, warn on dup in both local blacklist and whitelist
better var names, fix broken whitelist logic, warn on dup in both local blacklist and whitelist

jakeogh/dnsgate,jakeogh/dnsgate,jakeogh/dnsmasq-blacklist,jakeogh/dnsmasq-blacklist,jakeogh/dnsgate,jakeogh/dnsmasq-blacklist