plugin_register_config ("df", df_config,
config_keys, config_keys_num);
plugin_register_init ("df", df_init);
plugin_register_read ("df", df_read);
plugin_register_config ("df", df_config,
config_keys, config_keys_num);
plugin_register_init ("df", df_init);
plugin_register_read ("df", df_read);