Allow wireguard to create multiple ifaces

[thamenato]

Hey there,

For my use case I currently have multiple wireguard ifaces up simultaneously - which I control using systemd as:

systemctl start wg-quick@wg-iface1
systemctl start wg-quick@wg-iface2

Each one of these are a file with their own specific configuration that lives under /etc/wireguard and the resulting interface has the same naming convention as the original file:

It would be a very nice feature to have!

This is an awesome project and would help a lot my team of developers. It makes Wireguard much more accessible. Tks!