Increase WireGuard speeds with ECMP

I just saw someone do this on PC with mullvad and thought it should be pretty easy for you guys to implement. I think the Firewalla user base would really benefit from this.

Mullvad gives you 5 devices per account. Nothing stops you from registering two (or more) of those devices on the same computer and loading separate WireGuard configs.

Once you have two tunnels up to two different Mullvad servers, you use ECMP (Equal-Cost Multi-Path) routing on top. Basically the kernel spreads your connections across both tunnels so you use both at once.

His results

Single Mullvad server: 645 Mbps

Two Mullvad servers with ECMP: over 1300 Mbps