Looks like at least some people still want to rsync their own local dovecot.org mirrors, so I've now added rsync support back. Use rsync.dovecot.org as the host. You can rsync:

hg dovecotweb dovecotwiki dovecotwiki2

and mbox files of mailing list archives:

dovecotmail dovecotnewsmail dovecotcvsmail

So for example:

rsync -az rsync://rsync.dovecot.org/dovecotweb dovecotweb