[FIXED JENKINS-17084] Changelog should produce output even if some changelog annotator fails
[FIXED JENKINS-17128] Unquote labels before processing
[JENKINS-10502] Option to make the build NOT fail if there is nothing to archive
fixed compilation error
Backwards compatibility added. Added allowEmptyArchive test
Added help-allowEmptyArchive.html. Did some cleanup in ArtifactArchiver and config.jelly
the trunk is toward 1.508-SNAPSHOT
JUnit 4.
Merge pull request #732 from pjrt/JENKINS-10502

[FIXED JENKINS-10502] Option to make the build not fail if there is nothing to archive
Merge branch 'master' of github.com:jenkinsci/jenkins
[JENKINS-10502] Noting.
Suppressing RedeployPublisherTest.testBug2593 on jenkins.ci.cloudbees.com.
JUnit 4.
createTmpDir → TemporaryFolder
FailsOnCloud
Cannot pass -DexcludedGroups to the entire Jenkins build, since it will fail in other modules.
Due to SUREFIRE-974 using excludedGroups does not seem like an option.
Normalized help file locations.
${rootURL} should be used to locate env-vars.html, since otherwise the link will be broken when the builder is configured from a job inside a folder.
Skipping this test did work.