Merge pull request #1 from miyukki/feature/ipv6

Use Addressable::URI#hostname instead of Addressable::URI#host

lib/reverse_proxy/client.rb

@@ -79,7 +79,7 @@ module ReverseProxy
       target_request['Accept-Encoding'] = nil
 
       # Make the request
-      Net::HTTP.start(uri.host, uri.port, use_ssl: (uri.scheme == "https")) do |http|
+      Net::HTTP.start(uri.hostname, uri.port, use_ssl: (uri.scheme == "https")) do |http|
         target_response = http.request(target_request)
       end
 
@@ -141,4 +141,4 @@ module ReverseProxy
       name.sub(/^HTTP_/, "").gsub("_", "-")
     end
   end
-end
+end