Ensure that there is no "hidden" DNS lookup in secure socket code

runtime/bin/socket_patch.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 patch class RawServerSocket  {
   /* patch */ static Future<RawServerSocket> bind(address,
                                                   int port,
                                                   {int backlog: 0,
                                                    bool v6Only: false}) {
     return _RawServerSocket.bind(address, port, backlog, v6Only);
@@ skipping 70 matching lines @@
             InternetAddressType.IP_V4, "0.0.0.0", "0.0.0.0", sockaddr);
       case _ADDRESS_ANY_IP_V6:
         return new _InternetAddress(
             InternetAddressType.IP_V6, "::", "::", sockaddr);
       default:
         assert(false);
         throw new ArgumentError();
     }
   }
 
+  // Create a clone of this _InternetAddress replacing the host.
+  _InternetAddress _cloneWithNewHost(String host) {
+    return new _InternetAddress(
+        type, address, host, new Uint8List.fromList(_sockaddr_storage));
+  }
+
   String toString() {
     return "InternetAddress('$address', ${type.name})";
   }
 
   static Uint8List _fixed(int id) native "InternetAddress_Fixed";
 }
 
 
 // The _NativeSocket class encapsulates an OS socket.
 class _NativeSocket extends NativeFieldWrapperClass1 {
@@ skipping 964 matching lines @@
     if (_detachReady != null) {
       _detachReady.complete(null);
     } else {
       if (_raw != null) {
         _raw.shutdown(SocketDirection.SEND);
         _disableWriteEvent();
       }
     }
   }
 }