shutdown sockets gracefully instead of doing it with TCP reset (patch 1682438)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44862 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/gsocket.cpp

@@ -587,7 +587,7 @@ void GSocket::Shutdown()
   /* If socket has been created, shutdown it */
   if (m_fd != INVALID_SOCKET)
   {
-    shutdown(m_fd, 2);
+    shutdown(m_fd, 1);
     Close();
   }