Auto-sync with upstream branch master
    
    Upstream commit: db6c4935fae6005d46af413b32aa92f4f6059dce
    
    - Fix memmove call in vfprintf-internal.c:group_number
    - locale: Fix localedata/sort-test undefined behavior
    - test-memcpy.c: Double TIMEOUT to (8 * 60)
    - hurd: Remove unused __libc_close_range
    - hurd: Implement close_range and closefrom
    - x86: Double size of ERMS rep_movsb_threshold in dl-cacheinfo.h
    - x86: Optimize memmove-vec-unaligned-erms.S
    - benchtests: Add partial overlap case in bench-memmove-walk.c
    - benchtests: Add additional cases to bench-memcpy.c and bench-memmove.c
    - string: Make tests birdirectional test-memcpy.c
    - Remove the last trace of generate-md5 [BZ #28554]
    - Revert "benchtests: Add acosf function to bench-math"
    - Configure GCC with --enable-initfini-array [BZ #27945]
    - elf: Earlier missing dynamic segment check in _dl_map_object_from_fd
    - gconv: Do not emit spurious NUL character in ISO-2022-JP-3 (bug 28524)
    - [powerpc] Tighten contraints for asm constant parameters