print CF-Connecting-IP/X-Forwarded-For when present in socket.io requests

lib/util.js

@@ -174,3 +174,8 @@ exports.unfurlSRV = function(hostname, port, callback) {
 		callback(records[0].name, records[0].port);
 	})
 };
+
+exports.getRemoteAddr = function(req) {
+	let remoteAddress = req.headers['cf-connecting-ip'] || req.headers['x-forwarded-for'] || req.connection.remoteAddress;
+	return remoteAddress;
+};