Add reusePort argument to ServerSocket.

sdk/lib/io/socket.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.
 
 part of dart.io;
 
 
 /**
  * [InternetAddressType] is the type an [InternetAddress]. Currently,
  * IP version 4 (IPv4) and IP version 6 (IPv6) are supported.
@@ skipping 176 matching lines @@
    * using the [:port:] getter.
    *
    * The optional argument [backlog] can be used to specify the listen
    * backlog for the underlying OS listen setup. If [backlog] has the
    * value of [:0:] (the default) a reasonable value will be chosen by
    * the system.
    */
   external static Future<RawServerSocket> bind(address,
                                                int port,
                                                {int backlog: 0,
-                                                bool v6Only: false});
+                                                bool v6Only: false,
+                                                bool reusePort: false});
 
   /**
    * Returns the port used by this socket.
    */
   int get port;
 
   /**
    * Returns the address used by this socket.
    */
   InternetAddress get address;
@@ skipping 40 matching lines @@
    * [port] getter.
    *
    * The optional argument [backlog] can be used to specify the listen
    * backlog for the underlying OS listen setup. If [backlog] has the
    * value of [:0:] (the default) a reasonable value will be chosen by
    * the system.
    */
   external static Future<ServerSocket> bind(address,
                                             int port,
                                             {int backlog: 0,
-                                             bool v6Only: false});
+                                             bool v6Only: false,
+                                             bool reusePort: false});
 
   /**
    * Returns the port used by this socket.
    */
   int get port;
 
   /**
    * Returns the address used by this socket.
    */
   InternetAddress get address;
@@ skipping 243 matching lines @@
       } else {
         sb.write(", address = ${address.address}");
       }
     }
     if (port != null) {
       sb.write(", port = $port");
     }
     return sb.toString();
   }
 }