* Don't override detailed error string with generic one
 * Set the D-Bus reply error in case of jackctl_server_stop() failure
 * Set the D-Bus reply error in case of jack_controller_patchbay_init() failure
 * Don't set the D-Bus reply error in case of jack_deactivate() failure because
   this failure does not cause jack_controller_stop_server() failure and thus
   will cause memory leak.