- Better messages in case of a crash of the install-test script

move definition of platform dependent path related variables from os.py
to platform dependent path modules (ntpath, etc).

- 'os2' references in ntpath.py relate to the VACPP port, not the EMX port;
- the VACPP port uses the same defpath as all other ntpath.py supported
  platforms except 'ce'.

get help on os attributes)

the optional proto 2 slot state.

pickle.py, load_build():  CAUTION:  Noted that cPickle's
load_build and pickle's load_build really don't do the same
things with the state, and didn't before this patch either.
cPickle never tries to do .update(), and has no backoff if
instance.__dict__ can't be retrieved.  There are no tests
that can tell the difference, and part of what cPickle's
load_build() did looked accidental to me, so I don't know
what the true intent is here.

pickletester.py, test_pickle.py:  Got rid of the hack for
exempting cPickle from running some of the proto 2 tests.

dictobject.c, PyDict_Next():  documented intended use.

allows bdist, but it's still one big hack:-(

how to unpickle the new slot-full state tuples.

codecs registry startup.

into the relevant path modules.  See patch #686397.

  test_linuxaudiodev.py) are no longer run by default.  This is
  because they don't always work, depending on your hardware and
  software.  To run these tests, you must use an invocation like
    ./python Lib/test/regrtest.py -u audio test_ossaudiodev

now means "distutils-based source", binary "bdist format archive". Also
fixed various lurking bugs.

- avoid "e.g." in text
- record version information
(should be backported)

Renamed hook methods to use the double underscore convention.

Restored a Py2.2 behavior to not range check the day of the month.
A user application was this exploiting undocumented, accidental "feature".

version was moved into import.c long ago), so squashed the duplication.

  with an indented code block but no newline would raise SyntaxError.
  This would have been a four-line change in parsetok.c...  Except
  codeop.py depends on this behavior, so a compilation flag had to be
  invented that causes the tokenizer to revert to the old behavior;
  this required extra changes to 2 .h files, 2 .c files, and 2 .py
  files.  (Fixes SF bug #501622.)

and loading them via the other, except for the special cases of this
Guido added to test_datetime.py for datetime module objects.  The new
test_xpickle.py tries all of pickletester's AbstractPickleTests in
both x-module ways.

Curious: Str didn't need me to put something in tp_new, but Null did.
Why the difference?

test for now (cPickle can't yet produce NEWOBJ).

reference manual

exercised by the test suite before cPickle knows how to create NEWOBJ
too.  For now, it was just tried once by hand (via loading a NEWOBJ
pickle created by pickle.py).

coverage. From SF patch #662807