Merge branch '2.3' into 2.7

* 2.3:
  use new repo location in some readme.md

Author: nicolas-grekas

README.md

@@ -10,7 +10,7 @@ Resources
 
 Silex integration:
 
-https://github.com/fabpot/Silex/blob/master/src/Silex/Provider/FormServiceProvider.php
+https://github.com/silexphp/Silex/blob/master/src/Silex/Provider/FormServiceProvider.php
 
 Documentation: