The constructor docs referred the reader to the add_data() method's docs,
but they weren't very helpful.  I've simply copied an earlier explanation
of 'data' that's more useful.

[Bug #1414697] Change docstring of set/frozenset types to specify that the contents are unique.  Raymond, please feel free to edit or revert.

test_compiler now passes again.

docstrings correctly as it did in Python 2.4.

Regenerated Modules/_ctypes/libffi/configure with autoconf 2.59.

Approved by Neal.

with PEP 302.  This was fixed by adding an ``imp.NullImporter`` type that is
used in ``sys.path_importer_cache`` to cache non-directory paths and avoid
excessive filesystem operations during imports.

Cosmetic changes to the code so that the #ifdef _UNICODE block
doesn't mess emacs code formatting.

differs from both Linux and FreeBSD. Accepted by Neal Norwitz.

The reduces the test_uuid failures, but there's still another method failing.

concept, and that different ways of trying to find "the
hardware address" may return different results.  Certainly
true on both of my Windows boxes, and in different ways
(see whining on python-dev).

  methods now allow their database parameter to be None as the
  sleepycat API allows.

Also adds an appropriate test case for DBEnv.dbrename and dbremove.

We didn't notice these before because test_defaultdict didn't
actually do anything before Georg fixed that earlier today.
Neal's next refleak run then showed test_defaultdict leaking
9 references on each run.  That's repaired by this checkin.

Note that this has only been tested for VS 2003 since that's all I have.