Merge branch '3.4' into 4.2

* 3.4:
  [Console] Fix auto-complete for ChoiceQuestion (multi-select answers)
  Translated form, security, validators resources into Belarusian (be)
  [WebProfilerBundle] Don't filter submitted IP values
  bumped Symfony version to 3.4.28
  updated VERSION for 3.4.27
  update CONTRIBUTORS for 3.4.27
  updated CHANGELOG for 3.4.27

Author: fabpot