[redis] (2 commits) ...typo in redis-shutdown (debug mode always on, lot of uneeded noise)

[Haïkel Guémar]

Summary of changes:

  2d31309... Upstream 2.8.15 (critical bugfix for sentinel) (*)
  cb2be29... typo in redis-shutdown (debug mode always on, lot of uneede (*)

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