EDIT: Sorry, I did not grasp the changed logic. Found now how to do it. Thank you for development.
Different question : Is 802.11gn WLAN stable or should I stick to pure "g"?
HostAP based on Atheros AR9462 abng card.
Some cards (or their drivers in FreeBSD) don't do gn, but work fine in g mode. If you have trouble, bring it down to the lower mode, if not have fun. :)