fix sslwrap_simple (closes #22523)

Thanks Alex Gaynor.

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Closes #22537: Make sphinx extensions compatible with Python 2 or 3, like in the 3.x branches

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Closes #19342: improve docstrings in grp module.

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closes #22528: add source links to symtable and compileall

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merge heads

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Issue #20076: Remove just added the sr_rs.utf8@latn alias because it is
derived from sr_rs@latin.

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Issue #20079: Updated alias mapping to glibc 2.19 SUPPORTED file.

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Issue #20079: Fixed tests.

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Closes #19434: fix copy-paste error in MIMENonMultipart docstring.

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