archive.tpo's rsync logs ip addresses (and it shouldn't)
archive.tpo runs an rsync service, which logs to /var/log/rsyncd/rsyncd-archive.log, which includes lines like
2019/12/20 15:33:05  connect from UNDETERMINED (184.108.40.206) 2019/12/20 15:33:06  rsync on dist-mirror/ from UNDETERMINED (220.127.116.11)
In our privacy-oriented web log format, we explicitly don't collect timestamp beyond 'which day', and we scrub IP addresses: #20928 (moved).
We should do something similar for our rsync log format.