[$] WireGuarding the mainline

The WireGuard VPN tunnel has beenunder development - and attracting attention - for a few years now; LWN ran a review of it in March. While WireGuardcan be found in a number of distribution repositories, it is not yetshipped with the mainline kernel because its author, Jason Donenfeld, hasn'tgotten around to proposing it for upstreaming. That changed on onJuly 31, when Donenfeld postedWireGuard for review. Getting WireGuard itself into the mainline would probablynot be all that hard; merging some of the support code it depends on could beanother story, though.