Re-land:  Only allow HTTP/0.9 support on default ports.

Also add a group policy to allow HTTP/0.9 support on other
ports, which I plan to remove in a couple revisions.

Originally landed in https://codereview.chromium.org/2253653002/
Reverted in https://codereview.chromium.org/2297263002/
for breaking WebSocket tests.

TBR=eroman@chromium.org
BUG=624462, 637017

Review-Url: https://codereview.chromium.org/2299703003
Cr-Commit-Position: refs/heads/master@{#416074}
27 files changed