Auto-sync with upstream branch master
Upstream commit: cfba5dbb10cc3abde632b46c60c10b2843917035
- Keep expected behaviour for [a-z] and [A-z] (#1607286)
- Additional ucontext tests
- Intel CET enhancements
- ISO C11 threads support
- Fix out-of-bounds access in IBM-1390 converter (swbz#23448)
- New locale Yakut (Sakha) for Russia (sah_RU) (swbz#22241)
- os_RU: Add alternative month names (swbz#23140)
- powerpc64: Always restore TOC on longjmp (swbz#21895)
- dsb_DE locale: Fix syntax error and add tests (swbz#23208)
- Improve performance of the generic strstr implementation
- regcomp: Fix off-by-one bug in build_equiv_class (swbz#23396)
- Fix out of bounds access in findidxwc (swbz#23442)