Merge pull request #912 from milabtom/master

Handle SocketError.Shutdown

Author: dxdjgl

AUTHORS.md

@@ -25,3 +25,4 @@ Contributors
 * Calin Pirtea — [@pcalin](https://github.com/pcalin)
 * Osiris Pedroso — [@opedroso](https://github.com/opedroso)
 * Mike Miller — [@mikepmiller](https://github.com/mikepmiller)
+* Miguel Labayen — [@milabtom](https://github.com/milabtom)

src/NetMQ/Core/Transports/StreamEngine.cs

@@ -1049,7 +1049,8 @@ private static int EndWrite(SocketError socketError, int bytesTransferred)
                 socketError == SocketError.ConnectionAborted ||
                 socketError == SocketError.TimedOut ||
                 socketError == SocketError.ConnectionReset ||
-                socketError == SocketError.AccessDenied)
+                socketError == SocketError.AccessDenied || 
+                socketError == SocketError.Shutdown)
                 return -1;
 
             throw NetMQException.Create(socketError);