Merge IO v2 branch to bleeding edge

tests/standalone/io/secure_server_client_certificate_test.dart

 // Copyright (c) 2012, 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.
 
 import "dart:io";
 import "dart:isolate";
 
 const SERVER_ADDRESS = "127.0.0.1";
 const HOST_NAME = "localhost";
 
@@ skipping 30 matching lines @@
   }
 
   void errorHandlerServer(Exception e) {
     Expect.fail("Server socket error $e");
   }
 
   int start() {
     server = new SecureServerSocket(SERVER_ADDRESS,
                                     0,
                                     10,
-                                    "CN=$HOST_NAME",
+                                    "localhost_cert",
                                     requireClientCertificate: true);
     Expect.isNotNull(server);
     server.onConnection = onConnection;
     server.onError = errorHandlerServer;
     return server.port;
   }
 
   void stop() {
     server.close();
   }
@@ skipping 54 matching lines @@
   EndTest = () {
     Expect.equals(CLIENT_NAMES.length, server.numConnections);
     server.stop();
     keepAlive.close();
   };
 
   for (var x in CLIENT_NAMES) {
     new SecureTestClient(port, x);
   }
 }