Also now permit interactivly running tests without explicitly setting
$srcdir. This now works if we are inside ./tests and fails, as before,
when we are in a different directory.
Detected by shellcheck via CodeFactor.io
Support tools (like tcpflood) are also upgraded to support the
necessary dynamic port.s
This is part of the effort to make parallel testing possible.
We move parts of the cleanup to the buildbot cleanup, as we cannot
clean out instances on each test when we run parallel tests.
changes some of the test commands to use bash functions
includes some small bug fixes to tests where bugs were
previously not seen due to different plumbing.
Some old tests are carried out via the nettester tool. This was
our initial shot at a testbench a couple of years ago. While it
worked back then, the testbench framework has been much enhanced.
These old tests are nowadays very hard to handle, as they miss
debug support etc. So it is time to refactor them to new style.
As a side-activity, the testbench plumbing has been enhanced to
support some operations commonly needed by these tests. Contrary
to pre-existing plumbing, these new operations are now crafted
using bash functions, which we consider superior to the current
method. So this is also the start of converting the older-style
functionality into bash functions. We just did this now because
it was required and we entangled it into the test refactoring
because it was really needed. Else we had to write old-style
operations and convert them in another commit, which would
have been a waste of time.
Special thanks to Pascal Withopf for the initial step of taking
old tests and putting config as well as test data together into
the refactored tests, on which Rainer Gerhards than could build
to create the new tests and update testbench plumbing.
