Sync with upstream branch release/2.34/master
    
    Upstream commit: 3438bbca90895d32825a52e31a77dc44d273c1c1
    
    - Linux: Detect user namespace support in io/tst-getcwd-smallbuff
    - realpath: Avoid overwriting preexisting error
    - CVE-2021-3999: getcwd: Set errno to ERANGE for size == 1
    - tst-realpath-toolong: Fix hurd build
    - CVE-2021-3998: realpath: ENAMETOOLONG for result larger than PATH_MAX
    - stdlib: Fix formatting of tests list in Makefile
    - stdlib: Sort tests in Makefile
    - support: Add helpers to create paths longer than PATH_MAX
    - powerpc: Fix unrecognized instruction errors with recent binutils
    - x86: use default cache size if it cannot be determined [BZ #28784]
    - CVE-2022-23218: Buffer overflow in sunrpc svcunix_create (bug 28768)
    - sunrpc: Test case for clnt_create "unix" buffer overflow (bug 22542)
    - CVE-2022-23219: Buffer overflow in sunrpc clnt_create for "unix" (bug 22542)
    - socket: Add the __sockaddr_un_set function
    - Disable debuginfod in printer tests [BZ #28757]
    - Update syscall lists for Linux 5.16
    
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>