lib-storage: mailbox_list_iter_next() now enforces backends not to return mailbox name from data stack.
lib-storage: mailbox_list_iter_next() now enforces backends not to return mailbox name from data stack.

Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot