Add HTTP_1_1_REQUIRED error code for RST_STREAM and GOAWAY frames that was
introduced in draft-15. Also add INADEQUATE_SECURTY error code wherever it had
been forgotten.
This lands server change 79690279 by bnc in spdy_framer.cc and spdy_protocol.{h,cc}.
BUG=431306
Review URL: https://codereview.chromium.org/700583005
Cr-Commit-Position: refs/heads/master@{#303993}