Fix disabled dropdown items to appear disabled (regression in 2.264).
JENKINS-65021
Enhancement
Improve support for update site-defined setup wizard suggestions.
JENKINS-65172
Add a "CI" environment variable, always set to "true" as in most other CI solutions.
Note that the presence of this variable may change behavior of some of the tools used in your pipelines.
JENKINS-36707
Support 'min' and 'max' values in field definitions of forms.
JENKINS-63855
Add administrative monitors recommending no executors are configured on the controller.
pull 5337
Add a Jenkins User-Agent header to outgoing HTTP requests by default.
Use jenkins.UserAgentURLConnectionDecorator.disabled to disable it if needed.
pull 5368