yahns 1.14.1 - bugfixes only

This release avoids confusing HTTP/1.1 clients with a
"Transfer-Encoding: chunked" header on bodyless responses.
The header was causing "curl -T" to wait indefinitely for
a response body after the server sent a 204.
This regression was introduced with autochunk introduced
with yahns 1.13(*).

rack.hijack was also broken for ancient "HTTP/0.9" requests,
and now fixed.

4 changes since 1.14.0:

      queue_*: fix outdated comments
      http_response: support rack.hijack on HTTP/0.9 responses
      response: do not set chunked header on bodyless responses
      proxy_pass: do not chunk on bodyless upstream responses

(*) https://yhbt.net/yahns-public/20160805-yahns-1.13.0-released@lucky13/