added exception_controller config option

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

@@ -28,6 +28,7 @@ class Configuration
             ->scalarNode('charset')->end()
             ->scalarNode('document_root')->end()
             ->scalarNode('error_handler')->end()
+            ->scalarNode('exception_controller')->end()
             ->scalarNode('ide')->end()
             ->booleanNode('test')->end()
         ;

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

@@ -78,6 +78,10 @@ class FrameworkExtension extends Extension
             }
         }
 
+        if (isset($config['exception_controller'])) {
+            $container->setParameter('exception_listener.controller', $config['exception_controller']);
+        }
+
         if (isset($config['ide'])) {
             $patterns = array(
                 'textmate' => 'txmt://open?url=file://%%f&line=%%l',