Merge branch '2.3' into 2.6

* 2.3:
  Fix typo
  Check instance of FormBuilderInterface instead of FormBuilder
  [Security] TokenBasedRememberMeServices test to show why encoding username is required
  [Security] AbstractRememberMeServices::encodeCookie() validates cookie parts
  [console][formater] allow format toString object.
  [HttpFoundation] Fix baseUrl when script filename is contained in pathInfo
  Avoid redirection to XHR URIs
  [HttpFoundation] IpUtils::checkIp4() should allow  networks
  Fix HTML escaping of to-source links
  [FrameworkBundle] Removed unnecessary parameter in TemplateController
  [DomCrawler] Throw an exception if a form field path is incomplete.
  [Console] Delete duplicate test in CommandTest
  [TwigBundle] Refresh twig paths when resources change.
  WebProfiler break words
  fixed typo
  Update README.md
  [HttpKernel] Handle an array vary header in the http cache store
  [Security][Translation] fixes #14584
  [Framework] added test for Router commands.
  Handled bearer authorization header in REDIRECT_ form

Conflicts:
	src/Symfony/Component/Debug/ExceptionHandler.php

Author: fabpot

README.md

@@ -1,7 +1,7 @@
 Serializer Component
 ====================
 
-With the Serializer component its possible to handle serializing data structures,
+With the Serializer component it's possible to handle serializing data structures,
 including object graphs, into array structures or other formats like XML and JSON.
 It can also handle deserializing XML and JSON back to object graphs.