bitsavers doesn't normally image files from active sites, but when archive.netbsd.org
was down for an extended period of time and no mirrors were found, having at least the
NetBSD iso files mirrored worldwide seemed like a prudent thing to do.

This is a massive storage and bandwidth burden we've taken on, please be considerate
towards us and our mirrors.

For example, people trying to run 10's of rsyncs in parallel will be banned.

aek 20231002