title: How to enable http response buffering on HaProxy?
body: <p>I hope I understand it right: HAProxy is able (http-mode) to
  buffer the output (response) from a backend server, so that the
  server process is made free as soon as possible. A slow client
  would therefore "only" consume ressources on the HAProxy.
  How much data from the response can be buffered by HAProxy?
  Is there a config variable? Is it tcp/ip buffering or
  buffering in HAProxy userspace?</p>