Merge pull request #981 from methane/websocket

[websocket] Implement HttpListenerContext.AcceptWebSocketAsync()

diff --cc mcs/class/System/System.Net/HttpConnection.cs
Simple merge

diff --cc mcs/class/System/System.Net/HttpListenerRequest.cs
Simple merge

diff --cc mcs/class/System/System.Net/WebConnection.cs
Simple merge