Merge branch 'wireguard-fixes'

Jason A. Donenfeld says:

====================
wireguard fixes for 5.6-rc7

I originally intended to spend this cycle working on fun optimizations
and architecture for WireGuard for 5.7, but I've been a bit neurotic
about having 5.6 ship without any show stopper bugs. WireGuard has been
stable for a long time now, but that doesn't make me any less nervous
about the real deal in 5.6. To that end, I've been doing code reviews
and having discussions, and we also had a security firm audit the code.
That audit didn't turn up any vulnerabilities, but they did make a good
defense-in-depth suggestion. This series contains:

1) Removal of a duplicated header, from YueHaibing.
2) Testing with 64-bit time in our test suite.
3) Account for skb->protocol==0 due to AF_PACKET sockets, suggested
   by Florian Fainelli.
4) Clean up some code in an unreachable switch/case branch, suggested
   by Florian Fainelli.
5) Better handling of low-order points, discussed with Mathias
   Hall-Andersen.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>