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 [7497] connect from UNDETERMINED (128.112.16.131)
2019/12/20 15:33:06 [7497] rsync on dist-mirror/ from UNDETERMINED (128.112.16.131)
In our privacy-oriented web log format, we explicitly don't collect timestamp beyond 'which day', and we scrub IP addresses: legacy/trac#20928 (moved).
We should do something similar for our rsync log format.