* Upgrade to 4.2 version of Remoting.

* Upgrade to slave-installer 1.7.

[JENKINS-60867] Prevent creation of duplicated SetupWizard singleton instances on Jenkins startup (#4456)

* [JENKINS-60867] Blank page after SetupWizard: root cause

* Correct a test that was a bit too greedy

Release Drafter: Do not use `regression-fix` label for the changelog, use the global template (#4481)

* Release Drafter: Do not use `regression-fix` label for the changelog, clarify the category headers

* Release Drafter: use categories from the org-wide settings

Enforce singleton pattern in CaseInsensitiveComparator

* Export if plugin update is compatible

* Remove the erorr usage of Exported annoation

* Remove unclear export annotation

* Remove multicast discovery services.

* Refine clean up with DNSMultiCast.

Doesn't need to be referenced in the other pom any more.
We need to keep the class and the property around for a while.
Jenkins Test Harness sets the property. Until we can get all
versions aligned so it isn't needed, it's best to keep the property
doing nothing.

* Deprecate remaining class fragment.

* Remove unneeded dependency.

* Improve code comments for external usages.
Co-Authored-By: NJesse Glick <jglick@cloudbees.com>

* Remove multicast discovery services.

* Refine clean up with DNSMultiCast.

Doesn't need to be referenced in the other pom any more.
We need to keep the class and the property around for a while.
Jenkins Test Harness sets the property. Until we can get all
versions aligned so it isn't needed, it's best to keep the property
doing nothing.

* Deprecate remaining class fragment.

* Remove unneeded dependency.

* Add log warning messages.

* Don't need to implement the interface anymore.

* Fix initializer.

Change capitalization for logger.

* Add URLs to log messages.
Co-Authored-By: NDaniel Beck <1831569+daniel-beck@users.noreply.github.com>
Co-authored-by: NJesse Glick <jglick@cloudbees.com>
Co-authored-by: NDaniel Beck <1831569+daniel-beck@users.noreply.github.com>

* add configuration-as-code as suggested

[JENKINS-21837] Do not record user creating an agent

[JENKINS-54496] - Don't log node-monitoring errors from deleted nodes

* [JENKINS-51856] Add new milestones

* Apply suggestions from code review

* [JENKINS-51856] Improve description of JOB_CONFIG_ADAPTED

* [JENKINS-51856] Add test for milestones

* [JENKINS-51856] Fix test error

* Apply suggestions from code review
Co-Authored-By: NOleg Nenashev <o.v.nenashev@gmail.com>

* Update core/src/main/java/hudson/init/impl/GroovyInitScript.java
Co-Authored-By: NTim Jacomb <t.jacomb@kainos.com>
Co-authored-by: NOleg Nenashev <o.v.nenashev@gmail.com>
Co-authored-by: NTim Jacomb <t.jacomb@kainos.com>

* Annotate and fix Parameter functions
Signed-off-by: NRaihaan Shouhell <raihaan.shouhell@autodesk.com>

* Add checkfornull annotation

* Add test for issue
Signed-off-by: NRaihaan Shouhell <raihaan.shouhell@autodesk.com>

* Fix test

* Previous ctor was private d'oh

* Fix annotation

* Prevent parameter names from being null

* Add comment about check

* Add more tests.

Also a little cleanup of RSS.
Fix the broken "All all ..." title and description.
Remove a long unused bit for never implemented trackback.

* Increase date time checks.

* Copy and paste error.
Co-Authored-By: NWadeck Follonier <Wadeck@users.noreply.github.com>

* Assert not empty.
Co-Authored-By: NWadeck Follonier <Wadeck@users.noreply.github.com>

* Add a bunch more tests and clarify title.

Add a number of more tests. Test the various places that RSS is used.
Improve title wording to something consistent and somewhat sensible.
Co-authored-by: NWadeck Follonier <Wadeck@users.noreply.github.com>

add job duration as tooltip to build time

Spotbugs: Check for null issue

* Call parent.getItems once

* Restore check in includeItems

* Restore original call to getItems

[JENKINS-60907] add Buffered{In,Out}putStream to FilePath.TarCompression.NONE

Make sure that new instances of CaseInsensitiveComparator are not created when serializing/deserializing.

* Added a null check to getPreviousBuildsOverThreshold.

* Cleaned up accidental newline.

* Update core/src/main/java/hudson/model/Run.java
Co-Authored-By: NZbynek Konecny <zbynek1729@gmail.com>
Co-authored-by: NZbynek Konecny <zbynek1729@gmail.com>

set locale for test, because test fails on german system

Disable failing test in UDP broadcast

[JENKINS-60857] Pick up Winstone with fix