When setting KTRACE in the environment, client and server write
ktrace files. This simplifies debugging as system calls can be
inspected with kdump.

Increase timeout, otherwise test may fail on slow machines.

Add tests for pf divert-packet. Currently UDP packets are tested
with in and out rules. A single packet, the initial packet or the
response packet are diverted and reinjected.

Mark pf states created by this regress test with a label. Remove
all such states before basic testing to make sure that these subtests
are independent.

Fix some Perl statements perlcritic was bitching about: Variable
declared in conditional statement.

Align the three variants of Remote.pm.

Make the perl modules consistent for the multiple regression tests.
This includes coding style, better error messages and variable
naming.

Add divert tests that reuse protocol and port. They show what
happens when we close the socket but the divert state remains. If
a new socket uses the same protocol and port, it will use the old
dan

Add divert tests that reuse protocol and port. They show what
happens when we close the socket but the divert state remains. If
a new socket uses the same protocol and port, it will use the old
dangling state. Without searching for the correct rule, the divert-to
will fail. There are real life corner cases where this occurred.

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Add tests for raw IP divert. Set effective user ID to 0 only during
privileged operations for raw sockets and bind any.

Add a regression test suite for the pf divert-to and divert-reply
feature. It requires two machines, the local host is running the
regression test, the remote host gets pf divert rules installed.
Th

Add a regression test suite for the pf divert-to and divert-reply
feature. It requires two machines, the local host is running the
regression test, the remote host gets pf divert rules installed.
The diverted TCP connections are running between these hosts in
both directions. The remote host is controlled via ssh.

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