Get rid of all the library tags.

lib/src/utils.dart

 // Copyright (c) 2014, 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.
 
-library http_multi_server.utils;
-
 import 'dart:async';
 import 'dart:io';
 
 /// Merges all streams in [streams] into a single stream that emits all of their
 /// values.
 ///
 /// The returned stream will be closed only when every stream in [streams] is
 /// closed.
 Stream mergeStreams(Iterable<Stream> streams) {
   var subscriptions = new Set();
@@ skipping 36 matching lines @@
   return ServerSocket.bind(InternetAddress.LOOPBACK_IP_V6, 0).then((socket) {
     _supportsIpV6 = true;
     socket.close();
     return true;
   }).catchError((error) {
     if (error is! SocketException) throw error;
     _supportsIpV6 = false;
     return false;
   });
 }