Auto-sync with upstream branch master
    
    Upstream commit: d35fbd3e684e6bb5e5ec452ad8dac6ada8424bdd
    
    - linux: Return unsupported if procfs can not be mount on tst-ttyname-namespace
    - linux: Split tst-ttyname
    - Use Linux 6.4 in build-many-glibcs.py
    - x86: Adjust Linux x32 dl-cache inclusion path
    - elf: Update list of RISC-V relocations
    - Fix tests-clean Makefile target (bug 30545)
    - check_native: Get rid of alloca
    - ifaddrs: Get rid of alloca
    - x86: Make dl-cache.h and readelflib.c not Linux-specific
    - elf: Port ldconfig away from stack-allocated paths
    - Call "CST" a time zone abbreviation, not a name
    - benchtests: fix warn unused result
    - sysdeps/powerpc/fpu/tst-setcontext-fpscr.c: Fix warn unused result
    - rt/tst-mqueue4.c: Fix wrong number of argument for mq_open
    - debug/readlink{, at}_chk.c: Harmonize declaration and definition
    - wcsmbs/bits/wchar2{, -decl}.h: Clearly separate declaration from definitions
    - stdio-common: tests: Incorrect maxlen parameter for swprintf
    - sysdeps/{i386, x86_64}/mempcpy_chk.S: fix linknamespace for __mempcpy_chk
    - hurd: readv: Get rid of alloca
    - hurd: writev: Add back cleanup handler
    - Fix misspellings -- BZ 25337
    - C2x scanf %b support
    - C2x printf %wN, %wfN support (bug 24466)
    - tests: replace system by xsystem
    - tests: replace read by xread
    - hurd: writev: Get rid of alloca
    - grantpt: Get rid of alloca
    - string: strerror must not return NULL (bug 30555)
    - hurd: Add strlcpy, strlcat, wcslcpy, wcslcat to libc.abilist
    - manual: Manual update for strlcat, strlcpy, wcslcat, wclscpy
    - Add the wcslcpy, wcslcat functions
    - Implement strlcpy and strlcat [BZ #178]
    - tests: replace fgets by xfgets
    - tests: replace fread by xfread
    - posix: Add test case for gai_strerror()
    - posix: Handle success in gai_strerror()
    - LoongArch: Add support for dl_runtime_profile
    - malloc: Decrease resource usage for malloc tests
    - stdlib: Tune down fork arc4random tests
    - tst-getdate: Improve testcase flexibility and add test.
    - x86: Make the divisor in setting `non_temporal_threshold` cpu specific
    - x86: Refactor Intel `init_cpu_features`
    - x86: Increase `non_temporal_threshold` to roughly `sizeof_L3 / 4`
    - Remove unused DATEMSK file for tst-getdate
    - resolv_conf: release lock on allocation failure (bug 30527)