Auto-sync with upstream branch master
    
    Upstream commit: 4cc79c217744743077bf7a0ec5e0a4318f1e6641
    
    - librt: add test (bug 28213)
    - mtrace: Use a static buffer for printing [BZ #25947]
    - hurd mmap: Reduce the requested max vmprot
    - hurd mmap: Factorize MAP_SHARED flag check
    - aarch64: Make elf_machine_{load_address,dynamic} robust [BZ #28203]
    - elf: Unconditionally use __ehdr_start
    - hurd: Add support for AT_NO_AUTOMOUNT
    - [5/5] AArch64: Improve A64FX memset medium loops
    - [4/5] AArch64: Improve A64FX memset by removing unroll32
    - [3/5] AArch64: Improve A64FX memset for remaining bytes
    - [2/5] AArch64: Improve A64FX memset for large sizes
    - [1/5] AArch64: Improve A64FX memset for small sizes
    - Use binutils 2.37 branch in build-many-glibcs.py
    - Add PTRACE_GET_RSEQ_CONFIGURATION from Linux 5.13 to sys/ptrace.h
    - librt: fix NULL pointer dereference (bug 28213)
    - powerpc64: Add checks for Altivec and VSX in ifunc selection
    - powerpc64: Check cacheline size before using optimised memset routines
    - powerpc64: Replace some PPC_FEATURE_HAS_VSX with PPC_FEATURE_ARCH_2_06
    - Linux: Fix fcntl, ioctl, prctl redirects for _TIME_BITS=64 (bug 28182)
    - Add INADDR_DUMMY from Linux 5.13 to netinet/in.h
    - tst-mxfast: Don't run with mcheck
    - rt: Set the correct message queue for tst-mqueue10
    - Update sparc libm-test-ulps
    - linux: Add sparck brk implementation
    - test-dlclose-exit-race: avoid hang on pthread_create error
    - gethosts: Remove unused argument _type
    - hurd: Avoid spurious warning
    - gaiconf_init: Avoid double-free in label and precedence lists
    - copy_and_spawn_sgid: Avoid double calls to close()
    - iconv_charmap: Close output file when done
    - gconv_parseconfdir: Fix memory leak
    - ldconfig: avoid leak on empty paths in config file
    - Fix build of nptl/tst-thread_local1.cc with GCC 12
    - nis: Fix leak on realloc failure in nis_getnames [BZ #28150]
    - Remove obsolete comments/name from several benchtest input files.
    - Remove obsolete comments/name from acos-inputs, since slow path was removed.
    - Open master branch for glibc 2.35 development