#issue #133 introduced option to limit who can create public rooms. However, currently as it states, MUC protocol defines room creation via presence-join, which doesn't allow (or suggest) configuring room before creation, thus creating by default public rooms. In turn this causes majority of the clients that want to create the room to fail if the limitation is for example:

muc () {
    mucConfig () {
        'hidden-room-creation-acl' = DOMAIN
        'public-room-creation-acl' = DOMAIN_ADMIN
    }
}

(i.e. create public rooms by domain admin and hidden rooms without restrictions for domain users)

It would be better to gracefully fallback to hidden-room creation on presence-join if the user has permission to create such instead of flatly refusing to create the room altogether.