[newt/f21] (3 commits) ...0.52.18-1

[Miroslav Lichvar]

Summary of changes:

  9441ac4... remove old patches (*)
  2a9c09c... update to 0.52.18 (#1151455) (*)
  5423984... 0.52.18-1 (*)

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