https://www.torproject.org/projects/tordnsel.html.en links to https://gitweb.torproject.org/tor.git?a=blob_plain;hb=HEAD;f=doc/contrib/torel-design.txt which 404s "The full background and rationale for TorDNSEL is described in the official [design document](https://gitweb.torproject.org/tor.git?a=blob_plain;hb=HEAD;f=doc/contrib/torel-design.txt). The current service only supports the first query type mentioned in that document."