WireGuard to port to existing Crypto API

[David Miller]

From: Bruno Wolff III <bruno at wolff.to>
Date: Wed, 25 Sep 2019 04:17:00 -0500

> Are there going to be two branches, one for using the current API and
> one using Zinc?

This is inapproprate to even discuss at this point.

Let's see what the crypto based stuff looks like, evaluate it,
and then decide how to proceed forward.

Thank you.