[Swan] klips/ipsec module not loading

[Brian T]

> Building master with klips and trying to use it, but the ipsec.ko module
> doesn't seem to be loading correctly. Any particular debug I could turn on
> that would be useful?

Did some debugging and the error is coming from pfkey_v2.c pfkey_init()

error |= sock_register(&pfkey_family_ops);

Returning -17 -EEXIST from
https://elixir.bootlin.com/linux/v4.9.119/source/net/socket.c#L2462

Don't know where to look from there.

-Brian