MacOS and wg 1.0.11 issues (for me)

[Jason A. Donenfeld]

Tentative patch is here:
https://git.zx2c4.com/wireguard-go/commit/?id=54b5f7d7173d56508daa768e96a9f7d85de951dc

I'm unable to repro this problem on any of my systems, however, in
order to test that patch. And Apple's signing restrictions make it
impossible for me to send a test build to Janne, because
NetworkExtension is mac-app-store-only. So if anyone else experiences
what he's described AND has an apple developer account, please get in
touch.