Merge branch '4.4'

* 4.4:
  [Messenger] Perform no deep merging of bus middleware
  [HttpFoundation] Added possibility to configure expiration time in redis session handler
  [FrameworkBundle] Remove project dir from Translator cache vary scanned directories
  [HttpFoundation] Allow redirecting to URLs that contain a semicolon
  Drop useless executable bit
  [DoctrineBridge] Improve queries parameters display in Profiler
  catch exceptions when using PDO directly
  [SecurityBundle] fix failing test

Author: nicolas-grekas