Merge branch '2.7' into 2.8

* 2.7:
  [Security] Fix wrong term in UserProviderInterface
  [HttpFoundation] Set meta refresh time to 0 in RedirectResponse content
  [Security] validate empty passwords again
  [DI] Remove irrelevant comment from container
  [TwigBridge] cleaner implementation of the TwigRenderer

Author: fabpot

Container.php

@@ -30,16 +30,6 @@
  *
  * Parameter and service keys are case insensitive.
  *
- * A service id can contain lowercased letters, digits, underscores, and dots.
- * Underscores are used to separate words, and dots to group services
- * under namespaces:
- *
- * <ul>
- *   <li>request</li>
- *   <li>mysql_session_storage</li>
- *   <li>symfony.mysql_session_storage</li>
- * </ul>
- *
  * A service can also be defined by creating a method named
  * getXXXService(), where XXX is the camelized version of the id:
  *

Tests/ContainerTest.php

@@ -134,8 +134,8 @@ public function testGetServiceIds()
     public function testSet()
     {
         $sc = new Container();
-        $sc->set('foo', $foo = new \stdClass());
-        $this->assertSame($foo, $sc->get('foo'), '->set() sets a service');
+        $sc->set('._. \\o/', $foo = new \stdClass());
+        $this->assertSame($foo, $sc->get('._. \\o/'), '->set() sets a service');
     }
 
     public function testSetWithNullResetTheService()