copy of libz exists in $HOME/lib or /usr/local/lib.

non-framework builds and for all variants of Tk.

to parse more than one XML document per pyexpat xmlparser instance.
(Original patches by Hirokazu Yamamoto and Amaury Forgeot d'Arc, with
suggested wording by David Gutteridge)

failures when ssl is not present.

Previously a non-string, non-regex second argument and no callable
argument could cause the test to appear to always pass.

Remove useless test and unused variables. Initial patch by Andreas Schwab.

Closes #18456: Doc fix: PyDict_Update only works with dict-like objects, not key-value sequences. Patch by priyapappachan.

close the file descriptor if os.fdopen() fails

Suggested by Bruce Esrig on docs@.

Patch by Andreas Schwab.

new redirect of http://www.python.org/ to https://www.python.org.

Patch by Anastasia Filatova.

When running external programs such as a C compiler and getting an
error code, distutils only prints the program name.  With this change,
one can get the full command line by setting the DISTUTILS_DEBUG
environment variable.

This should have no compatibility issues, unless there are tools
that depend on the exact format of distutils debug messages.

Patch by Tshepang Lekhonkhobe, reviewed by Georg Brandl.