[Dovecot] Dovecot logs to syslog (other than MAIL)?

I see in the config file where I can enable syslog, but then all logging goes to the MAIL facility. I could find no reference to changing the facility:level for syslogging. Is that implemented, or planned?

I know I could just write it to a file, but I'd prefer to use syslog because then I can pipe it to a central logging server.