Use hostapd internal RADIUS server for attribute saving

[Bairdo]

There is no intention to fix this anytime soon.

Currently only external radius servers can be used if radius attributes need to be saved.

Off memory the issue might be that hostapd receives a packet (off the network) for external servers.
so perhaps we are processing it too early or something.
Maybe (idk) the internal radius server is handled internally by hostapd (and not on the network - localhost)