For some reason, the diff for distutils/_backport/misc.py makes it seem
like it?s a new file instead of showing the changes I did during the
merge.

This moves individual backported functions from compat into a new
_backport.misc module.  compat regains its original purpose of
containing 2to3 support code (i.e. compat for projects using distutils2,
not internal compat for d2 code) and all backports now live under the
private _backport subnamespace.

Also fix the definition of ?any? to bind it to the builtin in 2.5+
(fsencode and detect_encoding not changed, they never exist in
2.x).

shutil, sysconfig, tarfile and their tests have been updated to the
latest 3.2 version (except for test_tarfile which is not backported yet)
and edited to be compatible with 2.4.

Duplicates added in util during the Great Update have been deleted, as
well as functions I removed recently in packaging.  Unneeded modules in
_backport have been deleted or moved to d2.compat.