[FIXED JENKINS-21622] Release workspace leases (and avoid @2) even if post-build actions throw LinkageError.

[JENKINS-22583] Noting merge of #1182.
Conflicts:
	changelog.html

Taking advantage of https://github.com/stapler/stapler-adjunct-codemirror/issues/1 for new CodeMirror.

[FIXED JENKINS-22607] Avoid loading recent builds when deletion of builds older than some date has been requested.

Force httpclient to use a new protocol socket factory which does not explicitly bind to the client side interface.

Update jenkins.init.in

[FIXED JENKINS-20245]

Integrated v2.38

Improved documentation.

[FIXED JENKINS-21394] Avoid irrelevant job queing while node is offline

Conflicts:
	test/src/test/java/hudson/model/ProjectTest.java

Ugly hack to fix destroyProcess for Java8

[FIXED JENKINS-22583] Use unique id to distinguish between multiple included instances of the same page.

[FIXED JENKINS-22553] Do not expose plugin list that can be a subject of modification

(It may have a @TestExtension QueueItemAuthenticatorDescriptor if one is needed.)

No sense in spending ~20s running HtmlUnit to verify code which has since been deleted anyway (configuration-time ACL checks).