Github user shukitchan commented on the issue: https://github.com/apache/trafficserver/pull/1516 feature flag or feature gate should be fine. i think it is a bug, too. but unfortunately i think we still need to support that till the next major release.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---