The contents of this attribute are an implementation detail, as
documented for #9442, so we should not parse it, to support non-CPython
VMs in the future.

Unfortunately, one use comes directly from PEP 345, so an edit will have
to be agreed before fixing the code (see comment in d2.markers).

Other remaining uses are found in d2.compiler and could be replaced by
the platform module (which also parses sys.version, but then it wouldn?t
be my fault :)

I broke test_mixin2to3 somehow; distutils2-default is okay and packaging too,
so I don?t see an obvious reason right now, I?ll investigate later.

In addition, update the create module to use logging.

This codebase is compatible with 3.1, 3.2 and 3.3.  It was converted with 2to3
and a semi-automated diff/merge with packaging in 3.3 to fix some idioms.
We?ve now come full circle from 2.x to 3.x to 2.x to 3.x again :)

Starting from now, contributors can make patches for packaging (preferred, as
the stdlib?s regrtest is very useful), distutils2 or distutils-python3, and
we?ll make patches flow between versions.

This file is needed in other tests, so it?s better to have the support
code in tests.support.  It?s also simpler to just have a skip instead of
custom print/return/test suite fiddling.  Unfortunately, the xxmodule.c
file (resurrected from the repo, and also identical to the version in
Python 2.7) cannot be compiled by Python 2.4 and 2.5 on my computer, so
the test is skipped.

The code to fix up build_ext for Unix shared builds and Windows debug
builds was also moved to support for future reuse.

Finally, I fixed code using sysconfig._CONFIG_VARS directly so that it
calls get_config_var first, so that _CONFIG_VARS is a dict instead of
None.