Auto-sync with upstream branch release/2.28/master
    
    Upstream commit: fc0e3393ff775aa795b523083bb0db7f18d3b91e
    
    - RISC-V: Move libc_fesetround_riscv after libc_feholdexcept_riscv
    - pthread_spawn: Fix potential segfault in maybe_script_execute
    - preadv2/pwritev2: Fix misreported errno (swbz#23579)
    - kl_GL: Fix spelling of Sunday, should be "sapaat" (swbz#20209)
    - i386: Use _dl_runtime_[resolve|profile]_shstk for SHSTK (swbz#23716)
    - pthread_mutex_lock: Fix race while promoting to PTHREAD_MUTEX_ELISION_NP
      (swbz#23275)
    - signal: Use correct type for si_band in siginfo_t (swbz#23562)
    - stdlib/test-bz22786: Avoid spurious test failures using alias mappings
    - x86: Fix Haswell CPU string flags (swbz#23709)
    - libanl: Fix crash if first helper thread creation failed (swbz#22927)
    
    - Drop patches that were applied to upstream release/2.28/master branch:
        glibc-rh1614705.patch
        glibc-rh1615608.patch
        glibc-error-va_end.patch
        glibc-nscd-leak.patch
        glibc-nss_files-leak.patch
        glibc-rh1622669.patch
        glibc-1622674-1.patch
        glibc-1622674-2.patch
        glibc-rh1631338-1.patch
        glibc-rh1631338-2.patch
        glibc-rh1623519.patch
        glibc-rh1631719.patch
        glibc-rh1631728.patch
        glibc-rh1623519-2.patch