(Backported from 3.x by Jan Duzinkiewicz.)

it left off.  Patch by Michael Birtwell.

Patch by Till Maas.

doesn't support non-ASCII filenames.

(_testcapi isn't Py_ssize_t-clean, the "s#" code should use an int for length)

Issue #17918: When using SSLSocket.accept(), if the SSL handshake failed on the new socket, the socket would linger indefinitely.
Thanks to Peter Saveliev for reporting.

Issue #17289: The readline module now plays nicer with external modules or applications changing the rl_completer_word_break_characters global variable.
Initial patch by Bradley Froehle.

platforms. Patch by Federico Schwindt.

Putting *n* after the *iterable* matches the signature of other itertools
and recipes.  Also, it reads better.

Suggested by Ezio Melotti.

libffi to 3.0.13.  (i'm not sure if it is needed anymore but see
issue 10309 for details which makes no mention of upstream)