complex zeros on systems where the log1p function fails to respect
the sign of zero.  This fixes a test failure on AIX.

PY_ULLONG_MAX in pyport.h.  Thanks Hallvard B Furuseth for the patch.

exception catcher.  Wrapping the initial connection routine is not sufficient
as network timeouts can then occur as part of NNTP commands.

:option: is used to create a link to an option of python, not to mark
up any instance of any arbitrary command-line option.  These were
changed to ````.

For modules which do have a command-line interface, lists of options
have been properly marked up with the program/cmdoption directives
combo.  Options defined in such blocks can be linked to with :option:
later in the same file, they won’t link to an option of python.

Finally, the markup of command-line fragments in optparse.rst has
been cleaned to use ``x`` instead of ``"x"``, keeping that latter
form for actual Python strings.

Patch by Eli Bendersky and Éric Araujo.

Adding the wait_for() method to threading.Condition

message in importlib.

Thanks to Éric Araujo for spotting the inconsistency.

1. Online reference manual link is now version-specific and the
   'MODULE DOCS' section renamed to 'MODULE REFERENCE'.

2. 'FILE' section is moved to the end of the file.

3. Special names processed by pydoc such as __version__ or __credits__
   are now excluded from the DATA section.

4. Defined __all__ to prevent pydoc from exposing undocumented details
   about itself.

5. Removed Python 2.3 compatibility code.

zero-initialize all fields, fixing compiler warnings seen when building
extension modules with gcc with "-Wmissing-field-initializers" (implied
by "-W")

Patch by Robert Collins.