wg ifconfing control

Hello all,

I noticed that OpenBSD has added the ability to control the WireGuard
interfaces through ifconfig. I am interested in implementing similar
support in FreeBSD - is there anyone already working on this or perhaps the
right mentor for adding this functionality? NetBSD has a similar
functionality exposed through the wgconfig tool.

Short rationale: 1) not needing a package to do the setup, 2) procedural
configuration, 3) ability to include all config in rc.conf, 4) consistency
with other interface types (e.g. carp or gre).

Cheers,
Daniel