added a note about how to use the security outside the handling of a request (refs #473)

doc/providers/security.rst

@@ -63,6 +63,14 @@ Registering
             "symfony/security": "2.1.*"
         }
 
+.. caution::
+
+    The security features are only available after the Application has been
+    booted. So, if you want to use it outside of the handling of a request,
+    don't forget to call ``boot()`` first::
+
+        $application->boot();
+
 Usage
 -----
 

src/Silex/Provider/SecurityServiceProvider.php

@@ -71,11 +71,6 @@ class SecurityServiceProvider implements ServiceProviderInterface
         $app['security.access_rules'] = array();
 
         $app['security'] = $app->share(function ($app) {
-            // First, force everything to be setup correctly.
-            // This is needed when using the Security provider outside
-            // of the handling of a request
-            $app['security.listener'];
-
             return new SecurityContext($app['security.authentication_manager'], $app['security.access_manager']);
         });