[jenkins/f21] (7 commits) ...Merge branch 'master' into f21

[Michal Srb]

Summary of changes:

  683bb33... Update to upstream version 1.572 (*)
  f02d72c... Update to upstream version 1.575 (*)
  326dd77... Add R for webapp: jenkins-core and jenkins-cli (*)
  74ddccd... Update to upstream version 1.578 (*)
  04bb899... Add missing BR/R (*)
  b3a894d... Update to upstream version 1.581 (*)
  8d31dde... Merge branch 'master' into f21

(*) This commit already existed in another branch; no separate mail sent