[READ-ONLY] Subtree split of the Symfony Security Bundle
Latest commit 6a8a8f6 Jan 11, 2017 @nicolas-grekas nicolas-grekas Merge branch '3.2'
* 3.2:
  [DI] Add missing legacy group on testLegacy
  Minor tweaks
  Fix merge
  [DI] Dont share service when no id provided
  Fix Container and PhpDumper test inaccuracies
  [DI] Fix missing new line after private alias
  [ClassLoader] Throw an exception if the cache is not writeable
  Fixing regression in TwigEngine exception handling.