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 [email protected] or file a JIRA ticket
with INFRA.
---