How to enable ssh tag to use master ControlMaster?

This article describes ssh configuration changes.

http://www.anchor.com.au/blog/2010/02/ssh-controlmaster-the-good-the-bad-the-ugly/

I can quickly connect to my server when using ssh myserver, But cloth does not use this configuration, it is still very slow when connecting.

after adding the following code, the problem is still not resolved.

env.use_ssh_config=True 
env.ssh_config_path='/etc/ssh/ssh_config'