NFR-33 Adding logic to http_wait_for_response in order to print the right error
(408) message when client doesn't send complete request. TODO: Client times out
with the server timeout instead of the client timeout.
Merge branch '408_bug_fix' of github.com:pub-burrito/haproxy into 408_bug_fix
INFR-33 Making 408 error condition stronger for incomplete requests