Auto-sync with upstream branch master
    
    Upstream commit: c02e29a0ba47d636281e1a026444a1a0a254aa12
    
    - nss: Use shared prefix in IPv4 address in tst-reload1
    - nss: Enhance tst-reload1 coverage and logging
    - Use C11 atomics instead of atomic_decrement_and_test
    - Use C11 atomics instead of atomic_increment(_val)
    - Use C11 atomics instead of atomic_and/or
    - malloc: Print error when oldsize is not equal to the current size.
    - Use '%z' instead of '%Z' on printf functions
    - elf: Extract glibcelf constants from <elf.h>
    - scripts: Enhance glibcpp to do basic macro processing
    - scripts: Extract glibcpp.py from check-obsolete-constructs.py
    - riscv: Remove RV32 floating point functions
    - riscv: Consolidate the libm-test-ulps
    - hurd: Fix SIOCADD/DELRT ioctls
    - hurd: Drop struct rtentry and in6_rtmsg
    - hurd: Add _IOT_ifrtreq to <net/route.h>
    - elf: Use C11 atomics on _dl_mcount
    - hurd: Use IF_NAMESIZE rather than IFNAMSIZ
    - hurd: Add ifrtreq structure to net/route.h
    - hppa: undef __ASSUME_SET_ROBUST_LIST
    - linux: Use same type for MMAP2_PAGE_UNIT
    - m68k: Enforce 4-byte alignment on internal locks (BZ #29537)
    - nss: Fix tst-nss-files-hosts-long on single-stack hosts (bug 24816)
    - nss: Implement --no-addrconfig option for getent
    - gconv: Use 64-bit interfaces in gconv_parseconfdir (bug 29583)
    - elf: Implement force_first handling in _dl_sort_maps_dfs (bug 28937)
    - Linux: Do not skip d_ino == 0 entries in readdir, readdir64 (bug 12165)
    - hurd: Factorize at/non-at functions
    - tst-sprintf-errno: Update Hurd message length
    - RISC-V: Allow long jumps to __syscall_error
    - hurd: Make readlink* just reopen the file used for stat
    - hurd: Fix readlink() hanging on fifo
    - Fix BRE typos in check-safety.sh
    - Makerules: fix MAKEFLAGS assignment for upcoming make-4.4 [BZ# 29564]
    - Use relaxed atomics since there is no MO dependence