[TwigBridge][Trans]set %count% only on transChoice
Merge branch '2.3' into 2.4

* 2.3:
  [TwigBridge][Trans]set %count% only on transChoice
  [DomCrawler] Fixed a forgotten case of complex XPath queries
  bumped Symfony version to 2.3.16
  updated VERSION for 2.3.15
  updated CHANGELOG for 2.3.15

Conflicts:
	src/Symfony/Component/HttpKernel/Kernel.php