In case user configured Wireguard but there are no clients connected,
network hooks are never run and no domains can be resolved from the
sys-wireguard qube itself, therefore using Qrexec services to resolve
DNS in sys-wireguard hooks doesn't work and depended on connected
clients.
If Wireguard systemd service wasn't run, the nameserver will be empty
and that is not a problem.
In case user hasn't configured the Wireguard configuration correctly,
drop all connections.
- Remove OpenVPN code comments;
- Reorganize rules for easier reading;
- Server can connect without having client attached;
- Systemd service for easier monitoring of wg-quick; and
- Firewall also restarts wg-quick and apply new endpoint rules.
