problem where Python is configured with the nismodule but NIS isn't
installed, or the map names don't correspond to those hardcoded in
nismodule.c (which is bogus in and of itself).
test_*: converted to the new test harness. GvR note! test_signal.py
works interatively (i.e. when verbose=1) but does not work inside the
test harness. It must be a timing issue, but I haven't figured it out
yet.
