Merge pull request #436 from mikatammi/fix_port_forward_server_close

Add server_close after shutdown of ForwardServer

src/SSHLibrary/pythonforward.py

@@ -40,6 +40,7 @@ class SubHandler(LocalPortForwardingHandler):
     def close(self):
         if self.server:
             self.server.shutdown()
+            self.server.server_close()
             try:
                 logger.log_background_messages()
             except AttributeError: