Fix faulty default in serv_config.py

server_environment/serv_config.py

@@ -53,8 +53,10 @@ if not os.path.exists(ck_path):
     )
 
 
-def setboolean(obj, attr, _bool=_boolean_states):
+def setboolean(obj, attr, _bool=None):
     """Replace the attribute with a boolean."""
+    if _bool is None:
+        _bool = dict(_boolean_states) # we copy original dict
     res = _bool[getattr(obj, attr).lower()]
     setattr(obj, attr, res)
     return res