Merge branch '2.3' into 2.6

* 2.3:
  Added 'default' color
  [HttpFoundation] Reload the session after regenerating its id
  [HttpFoundation] Add a test case to confirm a bug in session migration
  [Finder] Command::addAtIndex() fails with Command instance argument
  [DependencyInjection] Freeze also FrozenParameterBag::remove
  fix CS
  fixed CS
  Add a way to reset the singleton
  [Security] allow to use `method` in XML configs
  Remove var not used due to returning early (introduced in 8982c32)
  Enhance hhvm test skip message

Author: fabpot

DependencyInjection/MainConfiguration.php

@@ -162,6 +162,7 @@ private function addAccessControlSection(ArrayNodeDefinition $rootNode)
                     ->cannotBeOverwritten()
                     ->prototype('array')
                         ->fixXmlConfig('ip')
+                        ->fixXmlConfig('method')
                         ->children()
                             ->scalarNode('requires_channel')->defaultNull()->end()
                             ->scalarNode('path')