Should disconnect clients on system suspend/sleep.

[ChipZhang]

If I suspend/sleep in the server side, the client software (remmina) just gets into a black screen and it will try to reconnect.
You should add a systemd suspend/sleep/hibernate hook and disconnect the client (run xrdp-dis or similar) on such events.

[matt335672]

Thanks for the suggestion, @ChipZhang