allow specifying hostnames for udp/http individually

Author: feross

server.js

@@ -121,9 +121,9 @@ Server.prototype.listen = function (/* port, hostname, onlistening */) {
   // ATTENTION:
   // binding to :: only receives IPv4 connections if the bindv6only
   // sysctl is set 0, which is the default on many operating systems.
-  if (self.http) self.http.listen(port.http || port, hostname || '::')
-  if (self.udp4) self.udp4.bind(port.udp || port, hostname)
-  if (self.udp6) self.udp6.bind(port.udp || port, hostname)
+  if (self.http) self.http.listen(port.http || port, (hostname && hostname.http) || hostname || '::')
+  if (self.udp4) self.udp4.bind(port.udp || port, (hostname && hostname.udp) || hostname)
+  if (self.udp6) self.udp6.bind(port.udp || port, (hostname && hostname.udp) || hostname)
 }
 
 Server.prototype.close = function (cb) {