Just so its clear what I have to do, is this what's expected for this function:

```diff
diff --git a/circus/commands/util.py b/circus/commands/util.py
index 6d22fc1..c472483 100644
--- a/circus/commands/util.py
+++ b/circus/commands/util.py
@@ -43,14 +43,9 @@ def convert_option(key, val):
         return util.to_bool(val)
     elif key.startswith('stderr_stream.') or key.startswith('stdout_stream.'):
         subkey = key.split('.', 1)[-1]
-
-        if subkey in ('class', 'filename'):
-            return val
-        elif subkey in ('max_bytes', 'backup_count'):
+        if subkey in ('max_bytes', 'backup_count'):
             return int(val)
-        elif subkey == 'refresh_time':
-            # Deprecated but warning below
-            return
+        return val
     elif key.startswith('hooks.'):
         subkey = key.split('.', 1)[-1]
```