We can't kldunload in the test head as Kyua interprets any output from
them. This would lead to syntax errors and skipping the entire file.
Move the kld commands into the test case bodies.
Pointed out by: asomers@
Some IPSec in tunnel mode allowing to test multiple IPSec
configurations. These tests are reusing the jail/vnet scripts from pf
tests for generating complex network.
Submitted by: olivier@
Differential Revision: https://reviews.freebsd.org/D13017