Bug#918624: Workaround for the missing prompt

[Vlastimil Zíma]

I have found a workaround for the issue using following commands:

    sudo systemctl start openvpn@work.service && sleep 3 && sudo
systemd-tty-ask-password-agent --query

The sleep is needed to provide enough time for the openvpn to trigger the
password prompt.

VZ