[qt5-qtdoc/f20] (3 commits) ...5.4.0 (final)

[Rex Dieter]

Summary of changes:

  af6c6c6... 5.4.0-beta (*)
  3656676... 5.4.0-rc (*)
  3d122a5... 5.4.0 (final) (*)

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