Make relayd test slow-consumer more reliable. Set SO_SNDTIMEO
sockopt correctly with Perl pack on i386. Make it possible to grep
in each others client and server logfile. Client does not simply
sleep but waits for short write at server.

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

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

Add a time.log file that accumulates timing information about the
executed tests. This allows to micro benchmark relayd.
based on a diff from andre@; OK reyk@

Implement non-persistent connections in a cleaner way. Every test
that offers multiple requets per HTTP connection is run twice.
First all requests are run over a single TCP connection. Then for
each requests a separate TCP connection is established. If a
requests during a persistent connection fails, a reconnect is done
as relayd cancels the whole connection. This allows stricter tests
for filters.
OK reyk@

Fix the relayd regression tests. Now they pass with and without
an obj directory. The relayd process can also run on a remote
machine for different timing.

Add relayd regression tests with http filter and late connect.

Sync relayd tests with socket splicing tests.

Allow the relayd regression tests to run the relayd on a different
host from client and server. Real TCP connections not running on
localhost provide a different timing uncovering more bugs.