playlist/Registry: add RAII class

src/Main.cxx

@@ -550,7 +550,7 @@ mpd_main_after_fork(const ConfigData &raw_config, const Config &config)
 	client_manager_init(raw_config);
 	const ScopeInputPluginsInit input_plugins_init(raw_config,
 						       instance->io_thread.GetEventLoop());
-	playlist_list_global_init(raw_config);
+	const ScopePlaylistPluginsInit playlist_plugins_init(raw_config);
 
 #ifdef ENABLE_DAEMON
 	daemonize_commit();
@@ -654,8 +654,6 @@ mpd_main_after_fork(const ConfigData &raw_config, const Config &config)
 	sticker_global_finish();
 #endif
 
-	playlist_list_global_finish();
-
 	return EXIT_SUCCESS;
 }