* 3.0:
  [#6032] some tweaks for the autowiring feature
  [DependencyInjection] Autowiring doc
  [Security] Include guard firewall configuration sample.
  Added doc about Homestead's Symfony integration
  [2.8] Add "How to Use Multiple Guard Authenticators" cookbook documentation
  remove note about memory spool handling on CLI
  [Cookbook][Serializer] fix wording
  Document translation_domain setting for choice fields
  translation_domain doc fix
  choice_translation_domain doc fix
  Travis fix
  Update entity.rst