Auto-sync with upstream branch master
    
    Upstream commit: 40b68e8cc00ca40348bc084b651c0561d31feb46
    
    - wcsmbs: Reformat Makefile.
    - linux: Reformat Makefile.
    - stdlib: Reformat Makefile.
    - stdio-common: Reformat Makefile.
    - socket: Reformat Makefile.
    - misc: Reformat Makefile.
    - debug: Reformat Makefile.
    - elf: Reformat Makefile.
    - libio: Add __nonnull for FILE * arguments of fclose and freopen
    - nss: Reconcile conditional declaration and use of `is_nscd'
    - Update syscall lists for Linux 6.3
    - hurd: rule out some mach headers when generating errno.h
    - Stop checking if MiG supports retcode.
    - Added Redirects to longdouble error functions [BZ #29033]
    - nptl: Reformat Makefile.
    - scripts: Add sort-makefile-lines.py to sort Makefile variables.
    - dlopen: skip debugger notification for DSO loaded from sprof (bug 30258)