[$] Progress on Zinc (thus WireGuard)

When last we looked at the WireGuard VPN code and its progresstoward mainline inclusion, said progress was impeded by disagreements aboutthe new "Zinc"cryptographic library that is added by the WireGuard patches. Since thatAugust look, several more versions of WireGuard and Zinc have been posted; it would seem that Zinc is gettingcloser to being accepted. Once that happens, the networking developers arepoised to review that portion of the code, which likely will leadto WireGuard in the kernel some time in the next development cycle or two.