Issue #21971: Index and update turtledemo doc.
Merge with 3.4
Remove unused and now removed config value.
merge with 3.4
Closes #19342: improve docstrings in grp module.
merge with 3.4
closes #22528: add source links to symtable and compileall
merge with 3.4
Issue #20076: Remove just added the sr_rs.utf8@latn alias because it is
derived from sr_rs@latin.
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.
Issue #20079: Updated alias mapping to glibc 2.19 SUPPORTED file.