[Swan] Version 3.31 XFRM implementation

[Paul Wouters]

On Wed, 11 Mar 2020, Paul Overton wrote:

> Thanks for the release of 3.31, I have replaced my 3.30 implementation and tested.
>
> I note that the commands leftinterface-ip= or rightinterface-ip= still do not install an IP address on the resultant ipsecX interfaces.
>
> Indeed it still reports that this command is obsolete.

That was a mistake on our end :( The 3.31 release should have contained
this patch:

https://github.com/libreswan/libreswan/commit/6d7aa7ef558b56df0aea7111236d9f0588b09fac

> Is this a work in progress ?

I guess it is now :/

Paul