455a456,466
> 
> For example, if we set up a HTTPS proxy server locally on port 8080. We first set 
> the tunnel host in `HTTPSConnection` and then the host we want to reach into 
> `set_tunnel`:
> 
>       >>> import http.client
>       >>> conn = http.client.HTTPSConnection("localhost",8080)
>       >>> conn.set_tunnel("www.python.org")
>       >>> conn.request("HEAD","/index.html")
> 
>