Not sure if this is a bug to report in a GitHub issue as async mode is currently unreleased. Thoughts?

In the sample above, GET requests work as expected, but any POST request hangs:

paracetamol 1162_% curl -dxx -vv 
*   Trying ::1...
* Connected to localhost (::1) port 3803 (#0)
> POST /x HTTP/1.1
> Host: localhost:3803
> User-Agent: curl/7.49.1
> Accept: */*
> Content-Length: 2
> Content-Type: application/x-www-form-urlencoded
>
* upload completely sent off: 2 out of 2 bytes
^C