Replacing the http-protocol-specific fields in the cluster config with a new plugin
Risk Level: medium
Testing: updated tests to use the new config
Docs Changes: updated docs to use the new config
Release Notes: deprecation notes in the PR
Deprecated: all http-specific cluster config.
Signed-off-by: Alyssa Wilk <alyssar@chromium.org>
Mirrored from https://github.com/envoyproxy/envoy @ 7554d61bccf136638bdfb383c10d049dc8bd3790