Optimize base64.b32encode() and base64.b32decode() (speed up to 3x).

Based on report and patch by Aaron Oakley.

Based on report and patch by Aaron Oakley.

Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of service using certificates with many wildcards (CVE-2013-2099).

Issue #17980: Fix possible abuse of ssl.match_hostname() for denial of service using certificates with many wildcards (CVE-2013-2099).

This caused an exception to be raised later than expected.

This caused an exception to be raised later than expected.

Backed out changeset c4ca39bece9d

Use the cleaner looking @property style for __dict__.
Move _replace() to be just after make() to indicate that
it is a core method on named tuples.

idx variable is used for a tuple indexn so use Py_ssize_t (not int).