Ignore deletedFolder test on Windows

Windows doesn't allow deleting directories that have a file open inside of them, so this test is invalid on windows.

Minor memory optimisation in label parsing

Noting that ParameterValue.getValue can on occasion return null

Fix JENKINS-41756 - Indecently translated items

Removed false and indecently to slovene translated main menu items.

[FIX JENKINS-41864] Add warning for rare dates

Fix tests on Windows

[FIXED JENKINS-42194] Do not display a warning when no schedules

[FIXED JENKINS-41128] createItem in View not working when posting xml

* Reference redirectors and jenkins.io as much as possible

* Something went wrong, so this is a troubleshooting URL

* More specific redirect URLs

* [JENKINS-31598] upgrade commons-collections due to CVE against v3.2.1

* Fix broken tests

Update findFormItem so it can return checked radio buttons

[JENKINS-42141] Fix performance issue in code merging Tool installer list

Previously, impossible dates caused 100% CPU while Jenkins was
trying to find the previous/next occurrence of the date.

* Remove changelog from jenkinsci/jenkins repository
* Add tombstone file directing people to jenkins-infra/jenkins.io

[JENKINS-18734] - Call perform(AbstractBuild build, Launcher launcher, BuildListener listener) if implemented in BuildStep

[FIXED JENKINS-36872] Switch to com.mysema.maven:apt-maven-plugin for Java 8 support

[JENKINS-32820, JENKINS-42164] - Windows service restart does not retain the build queue

[JENKINS-40710, JENKINS-41513, JENKINS-41852, JENKINS-41730] - Update remoting to 3.5

Typo

[JENKINS-33358] update Groovy to 2.4.8

Security232Test seems flaky