message: expose cfg dumper to refig
  Summary: cfg dumper config was not exposed to refig, make it so.
diff: @@ -99,4 +99,6 @@ void GlobalConfig::bind_config() {
  bind("pure_methods", {}, string_vector_param);
  bind("record_keep_reasons", {}, bool_param);
  bind("string_sort_mode", "", string_param);
  + bind("write_cfg_each_pass", false, bool_param);
  + bind("dump_cfg_classes", "", string_param);
  }
  