It is now possible to use a custom type for the __builtins__ namespace, instead
of a dict. It can be used for sandboxing for example.  Raise also a NameError
instead of ImportError if __build_class__ name if not found in __builtins__.

_multiprocessing.win32 modules now live in a single module "_winapi".
Patch by sbt.

   in order to understand the algorithm anyway.

2) v->exp == -v->digits may be assumed.

3) Fix comment (v always shares data with a).

rightfully states that an mpd_t with a coefficient flagged as MPD_CONST_DATA
must not be in the position of the result operand. In this particular case
several assumptions guarantee that a resize will never occur in all possible
code paths, which was the reason for using MPD_CONST_DATA and saving an
instruction by omitting the initialization of tmp.alloc.

For readability, tmp is now flagged as MPD_STATIC_DATA and tmp.alloc
is initialized.

Being able to overload a sys.module entry during import of a module was broken
by this changeset.

Add INCREFs, fix args->kwargs, and a second args==NULL check was removed,
left over from a merger with another function. Instead, checking msg==NULL
does what that used to do in a roundabout way.

in importlib.

Thanks to PJE for pointing out the issue and Nick Coghlan for filing
the bug.

or __name__ are not set in globals.

Thanks to Stefan Behnel for the bug report.

chown() to root under certain circumstances.

chown() to root under certain circumstances.

conditions when regrtest is run with its -j option.