Auto-sync with upstream branch master
    
    Upstream commit: 61bac1a9d2ab80ebcbc51484722e6ea43414bec7
    
    - nss: Remove unused allocation from get_nscd_addresses in getaddrinfo
    - x86/cet: Don't disable CET if not single threaded
    - x86: Modularize sysdeps/x86/dl-cet.c
    - x86/cet: Update tst-cet-vfork-1
    - elf: Add TLS modid reuse test for bug 29039
    - aarch64: Add SIMD attributes to math functions with vector versions
    - aarch64: Add half-width versions of AdvSIMD f32 libmvec routines
    - Fix elf/tst-env-setuid[-static] if test needs to be rerun.
    - Fix elf: Do not duplicate the GLIBC_TUNABLES string
    - tst-setcontext10.c: Undef _FORTIFY_SOURCE
    - Fix elf: Do not duplicate the GLIBC_TUNABLES string
    - riscv: Fix feenvupdate with FE_DFL_ENV (BZ 31022)
    - manual: Clarify undefined behavior of feenableexcept (BZ 31019)
    - x86: Do not raises floating-point exception traps on fesetexceptflag (BZ 30990)
    - i686: Do not raise exception traps on fesetexcept (BZ 30989)
    - powerpc: Do not raise exception traps for fesetexcept/fesetexceptflag (BZ 30988)
    - elf: Do not set invalid tunables values
    - elf: Do not duplicate the GLIBC_TUNABLES string
    - x86/cet: Check CPU_FEATURE_ACTIVE in permissive mode
    - x86/cet: Check legacy shadow stack code in .init_array section
    - x86/cet: Add tests for GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK
    - x86/cet: Check CPU_FEATURE_ACTIVE when CET is disabled
    - x86/cet: Check legacy shadow stack applications
    - localedata: id_ID: change first weekday to Sunday
    - s390: Set psw addr field in getcontext and friends.
    - x86: Unifies 'strlen-evex' and 'strlen-evex512' implementations.
    - x86/cet: Don't assume that SHSTK implies IBT
    - id_ID: Update Time Locales
    - Update code to handle the new ABI for sending inlined port rights.
    - x86/cet: Check user_shstk in /proc/cpuinfo
    - Add a test for setjmp/longjmp within user context
    - Add a test for longjmp from user context
    - powerpc: Add space for HWCAP3/HWCAP4 in the TCB for future Power.
    - powerpc: Fix performance issues of strcmp power10
    - localedata: Convert el_GR and el_CY locales to UTF-8
    - localedata: el_GR: Greece now uses the 24h format for time
    - powerpc : Add optimized memchr for POWER10
    - intl: Treat C.UTF-8 locale like C locale, part 2 (BZ# 16621)
    - resolv: Fix a few unaligned accesses to fields in HEADER
    - x86: Check PT_GNU_PROPERTY early