[Dovecot] shared folders?

Greetings, I saw mention in results from a google search that there was some support in dovecot CVS for shared folders, is there some docs on how to use them? Provided there is in fact support for them in CVS.

Thanks.

-- Gareth J. Greenaway | gareth@wiked.org SCLUG - Simi Conejo Linux Users Group http://www.sclug.org