Basic pluto with IKEv2 using PSK on the initiator (west), and Strongswan on
FreeBSD on the responder.

This test is not yet meant to run automatically.

The output on freebsd for the kernel state will be something like:

root@freebsd:/usr/local/etc # setkey -D
2001:db8:1:2::23 2001:db8:1:2::45
	esp mode=tunnel spi=1675186937(0x63d952f9) reqid=1(0x00000001)
	E: rijndael-cbc  1dd058ed 63905223 147979df 1865bfb3
	A: hmac-sha1  fde84c78 b2c90386 600927e3 1eb3dcf8 3163d053
	seq=0x00000000 replay=0 flags=0x00000000 state=mature 
	created: Feb  2 17:29:42 2019	current: Feb  2 17:37:19 2019
	diff: 457(s)	hard: 3600(s)	soft: 2960(s)
	last:                     	hard: 0(s)	soft: 0(s)
	current: 0(bytes)	hard: 0(bytes)	soft: 0(bytes)
	allocated: 0	hard: 0	soft: 0
	sadb_seq=1 pid=1404 refcnt=1
2001:db8:1:2::45 2001:db8:1:2::23
	esp mode=tunnel spi=3301523791(0xc4c9414f) reqid=1(0x00000001)
	E: rijndael-cbc  d32b7287 8e0ef003 3a2bac01 4b14d0c7
	A: hmac-sha1  1a3b1fc7 091e76f5 860456f2 5342ceaa bc33a3d3
	seq=0x00000000 replay=4 flags=0x00000000 state=mature 
	created: Feb  2 17:29:42 2019	current: Feb  2 17:37:19 2019
	diff: 457(s)	hard: 3600(s)	soft: 2611(s)
	last:                     	hard: 0(s)	soft: 0(s)
	current: 0(bytes)	hard: 0(bytes)	soft: 0(bytes)
	allocated: 0	hard: 0	soft: 0
	sadb_seq=0 pid=1404 refcnt=1
root@freebsd:/usr/local/etc # setkey -DP
192.0.1.0/24[any] 192.0.2.0/24[any] any
	in ipsec
	esp/tunnel/2001:db8:1:2::45-2001:db8:1:2::23/unique:1
	created: Feb  2 17:29:42 2019  lastused: Feb  2 17:29:42 2019
	lifetime: 9223372036854775807(s) validtime: 0(s)
	spid=1 seq=1 pid=1405 scope=global 
	refcnt=1
192.0.2.0/24[any] 192.0.1.0/24[any] any
	out ipsec
	esp/tunnel/2001:db8:1:2::23-2001:db8:1:2::45/unique:1
	created: Feb  2 17:29:42 2019  lastused: Feb  2 17:29:42 2019
	lifetime: 9223372036854775807(s) validtime: 0(s)
	spid=2 seq=0 pid=1405 scope=global 
	refcnt=1

