To reproduce:

* Install fresh Fedora 34 VM
* Compile Bitcoin Core and run `./test/functional/p2p_dns_seeds.py`
{__NR_splice, "splice"},
    {__NR_stat, "stat"},
    {__NR_statfs, "statfs"},
    {__NR_statx, "statx"},
    {__NR_swapoff, "swapoff"},
    {__NR_swapon, "swapon"},
    {__NR_symlink, "symlink"},
    {__NR_symlinkat, "symlinkat"},
    {__NR_sync, "sync"},
    {__NR_sync_file_range, "sync_file_range"},
    {__NR_syncfs, "syncfs"},
    {__NR__sysctl, "_sysctl"},
    {__NR_sysfs, "sysfs"},
    {__NR_sysinfo, "sysinfo"},
    {__NR_syslog, "syslog"},
    {__NR_tee, "tee"},
    {__NR_tgkill, "tgkill"},
    {__NR_time, "time"},
    {__NR_timer_create, "timer_create"},
    {__NR_timer_delete, "timer_delete"},
    {__NR_timerfd_create, "timerfd_create"},
    {__NR_timerfd_gettime, "timerfd_gettime"},
    {__NR_timerfd_settime, "timerfd_settime"},
    {__NR_timer_getoverrun, "timer_getoverrun"},
    {__NR_timer_gettime, "timer_gettime"},
    {__NR_timer_settime, "timer_settime"},
    {__NR_times, "times"},
    {__NR_tkill, "tkill"},
    {__NR_truncate, "truncate"},
    {__NR_tuxcall, "tuxcall"},