Issue #21971: Index and update turtledemo doc.

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branch : 3.4
Merge with 3.4
Remove unused and now removed config value.

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branch : 3.4
merge with 3.4
Closes #19342: improve docstrings in grp module.

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branch : 3.4
merge with 3.4
closes #22528: add source links to symtable and compileall

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branch : 3.4
merge with 3.4
Issue #20076: Remove just added the sr_rs.utf8@latn alias because it is
derived from sr_rs@latin.

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branch : 3.4
Issue #20076: Apply optimization in makelocalealias.py repeatedly.

Remove just added the sr_rs.utf8@latn alias because it is
derived from sr_rs@latin.
Issue #20079: makelocalealias.py now supports installed SUPPORTED file,
not only source SUPPORTED file in glibc sources tree.
Issue #20079: Updated alias mapping to glibc 2.19 SUPPORTED file.

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branch : 3.4
Issue #20079: Updated alias mapping to glibc 2.19 SUPPORTED file.
Issue #20079: Fixed tests.

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branch : 3.4
Issue #20079: Fixed tests.
Closes #19434: fix copy-paste error in MIMENonMultipart docstring.

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branch : 3.4
extra : rebase_source : e18c0309062bdd3978a050d213c4f54c28e42569
merge 3.4
Closes #18729: minor markup improvement.

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branch : 3.4
merge 3.4