Make sure chunked responses from Rails works ok

[paneq]

https://groups.google.com/forum/?fromgroups=#!topic/rubyonrails-core/j5F0LchIaX8

It is problematic for some servers and probably does not work correctly right now

buffer = ""
body.each { |part| buffer << part }
return Response.new(status, headers, buffer)

We could check the Transfer-Encoding header for chunked value and send every chunk separately to m2 (and probably an empty one at the end).

[paneq]

Or we could just deliver every part to m2 as separate ZMQ message.