[newt/f20] (4 commits) ...0.52.16-2

[Miroslav Lichvar]

Summary of changes:

  c5d0685... add python3 support (#963839) (*)
  b291511... rename snackmodule to snack (#963839) (*)
  fa31b7e... build python3 subpackage (#963839) (*)
  ba43041... 0.52.16-2 (*)

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