The 2.516.1-rc will be delayed at least one day while we repair a mistake that I made during the preparation of the first backporting pull request.
The mistake I made was to skip one item in the Jenkins LTS 2.516.1 release checklist. That item says:
Open a pull request towards the acceptance test harness and plugin compatibility test to confirm the incremental produced by the backporting PR doesn't contain regressions.
As a consequence of my mistake, a change that causes ATH test failures was merged to the Jenkins stable-2.516 branch.
A pull request has been proposed for the master branch that is confirmed to fix the acceptance test harness failure. I hope all can be resolved by end of day tomorrow so that the release candidate availability is only delayed by one day.
Thanks,
Mark Waite