• Delaying input setup of a stream just before processing starts. This allows
  any EOS indicator arriving from the client before that to take effect.
  Without knowing that a stream has no input, internal processing has to
  simulate chunked encoding. This is not wrong, but somewhat more expensive
  and mod_security has been reported to be allergic to seeing 'chunked'
  on some requests. See https://bz.apache.org/bugzilla/show_bug.cgi?id=66282.
• mod_proxy_http2: fixed #235 by no longer forwarding 'Host:' header when
  request ':authority' is known. Improved test case that did not catch that
  the previous 'fix' was incorrect.