[Dovecot] Dovecot2 - equivalent of "dovecot --exec-mail imap" with custom configuration file

Is it possible in dovecot2 to run "imap via stdin&stdout" *WITH* custom configuration file?

http://wiki2.dovecot.org/Upgrading/2.0

• "dovecot --exec-mail imap" has been replaced by simply running "imap" binary. ...

-- [pl>en: Andrew] Andrzej Adam Filip : anfi@onet.eu Love is the only game that is not called on account of darkness. -- M. Hirschfield