allow disabling of the web UI altogether

src/pool.c

@@ -2930,6 +2930,7 @@ cleanup(void)
     log_info("Performing cleanup");
     if (listener_event)
         event_free(listener_event);
+    if (config.webui_port)
         stop_web_ui();
     if (signal_usr1)
         event_free(signal_usr1);
@@ -3092,6 +3093,7 @@ int main(int argc, char **argv)
     uic.pool_ssl_port = config.pool_ssl_port;
     uic.allow_self_select = !config.disable_self_select;
     uic.payment_threshold = config.payment_threshold;
+    if (config.webui_port)
         start_web_ui(&uic);
 
     run();