[Dovecot] imapmagicplus equivalent?

[Juergen Kreileder]

Hi,

is anything like Cyrus IMAP's imapmagicplus option available for 
Dovecot?  If not, would it be possible to implement as a plugin?

> imapmagicplus: 0
> Only list a restricted set of mailboxes via IMAP by using userid+namespace syntax as the authentication/authorization id.  Using userid+ (with an empty namespace) will list only subscribed mailboxes.

It's a quite useful option for clients that don't understand 
subscriptions.  E.g., I don't want to see all of my folders on my 
iPhone, by using userid+ I can limit them to a useful set.


	Juergen