Use EventEmitter public API instead of the private _events array

lib/socket.io/listener.js

@@ -27,17 +27,15 @@ Listener = this.Listener = Class({
 		this.clients = [];
 		this.clientsIndex = {};
 
-		var listener = (this.server._events['request'] instanceof Array) 
-			? this.server._events['request'][0] 
-			: this.server._events['request'];
-		if (listener){
-			this.server._events['request'] = function(req, res){
-				if (self.check(req, res)) return;
-				listener(req, res);
-			};
-		} else {
-			throw new Error('Couldn\'t find the `request` event in the HTTP server.');
-		}
+		var listeners = this.server.listeners('request');
+		this.server.removeAllListeners('request');
+
+		this.server.addListener('request', function(req, res){
+			if (self.check(req, res)) return;
+			for (var i = 0; i < listeners.length; i++) {
+				listeners[i].call(this, req, res);
+			}
+		});
 
 		this.server.addListener('upgrade', function(req, socket, head){
 			if (!self.check(req, socket, true)){