Autosubscribe to public folder

Hello everyone! I am trying to migrate from Dovecot 1.2 to Dovecot 2.2 and I cant find information how to subscribe all users to public folder. In Dovecot 1.2 I have a few strings kind of "autosubscribeX = Public.Documents" and every users get subscribed to this Public folders and cant unsubscribe. This is a goal. Is any posibility to make the same in Dovecot 2.2 or each user have to susbscribe to public folders themselves and this is kind of policy of Dovecot 2.2?

-- С уважением, Рустам Багов.