help with setting up IPSEC in FreeBSD 12

[Rudy]

I see an /etc/ipsec.conf in FreeBSD 12 -- how do I set this up?  I have 
the gif0 all configured, but need help with the IPSEC part.

Is there a solid (modern) how-to on setting up IPSEC on freebsd? 
examples of creating keys, and configuring would be great.

The handbook talks about racoon and ipsec-tools, but that port has been 
discontinued.
   https://www.freebsd.org/doc/en/books/handbook/ipsec.html
It needs an update.


Thanks,
Rudy