Updated MonologBundle config for the new syntax for nested handlers

Author: stof

app/config/config_prod.yml

@@ -6,7 +6,8 @@ monolog:
         main:
             type:         fingerscrossed
             action_level: error
-            handler:
-                type:  stream
-                path:  %kernel.logs_dir%/%kernel.environment%.log
-                level: debug
+            handler:      nested
+        nested:
+            type:  stream
+            path:  %kernel.logs_dir%/%kernel.environment%.log
+            level: debug