cleanup overflowing handling in unicode_decode_call_errorhandler and unicode_encode_ucs1 (closes #22518)

with non-standard cookie handling in some Web browsers.

Reported by Sergey Bobrov.

Issue #13540: Update references to Action class to match syntax used for other classes in this file.

Issue #13540: Removed redundant documentation about Action instance attributes. Updated example and documentation per recommendations by Steven Bethard in msg149524.

broken by the fix for security issue #19435.  Patch by Zach Byrne.

broken by the fix for security issue #19435.  Patch by Zach Byrne.

in order to have the same resolution as pthreads condition variables.
At the same time, it must be large enough to accept 31 bits of
milliseconds, which is the maximum timeout value in the windows API.
A PY_LONG_LONG of microseconds fullfills both requirements.
This closes issue #20737

Bug reported by Guido Vranken.