[FrameworkBundle] removed support for none as an equivalent to false/null

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/SecurityExtension.php

@@ -174,7 +174,7 @@ class SecurityExtension extends Extension
         }
 
         // Security disabled?
-        if (isset($firewall['security']) && ('none' === $firewall['security'] || !$firewall['security'])) {
+        if (isset($firewall['security']) && !$firewall['security']) {
             return array($matcher, array(), null);
         }
 

src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/xml/firewall.xml

@@ -10,7 +10,7 @@
             <user name="foo" password="foo" roles="ROLE_USER" />
         </provider>
 
-        <firewall pattern="/login" security="none" />
+        <firewall pattern="/login" security="false" />
 
         <firewall stateless="true">
             <http-basic />