acl: ACLs apply to private flags as well. Fixed returning READ-ONLY resp-code.
acl: ACLs apply to private flags as well. Fixed returning READ-ONLY resp-code.

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