lib-storage: Fixed getting flags for subscribed mailboxes with non-default namespace settings.
lib-storage: Fixed getting flags for subscribed mailboxes with non-default namespace settings.

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jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot