[Swan] converting to use NAT traversal

[Paul Wouters]

On Thu, 9 Jan 2020, Alex wrote:

> I figured it out. Before the hard disk crash, I was running fedora30.
> After the crash, I rebuilt the system using fedora31 and restored the
> config from fedora30.
>
> There's either something wrong with libreswan on fedora31 or it
> doesn't work when trying to connect to another fedora30 libreswan
> system.

The only difference I see between f30 and f31 is that f30 has the
patch libreswan-3.29-updown-syntax.patch and f31 does not. I've just
pushed an update for f31, so this should appear in updates-testing
shortly. Similarly fedora/rawhide was missing this too, and a build
was fired of for that as well.

Thanks for pointing this out,

Paul