Support running Jenkins WARs on Java 11 without downloading JAXB JARs. A new JAXB plugin is marked as a detached one when running with Java 11 or higher.
(issue 55681, pull 3711, plugin page)
Report names of items being deleted in confirmation dialogs.
(issue 55848)
Replaced text references to slave with agent in various log entries and built-in help pages
(issue 51320)
Improve diagnostics of missing Old Data Administrative Monitor.
(pull 3240, related issue)