Fix freeradius config and enable query_on_not_found
Fix freeradius config and enable query_on_not_found

The default configuration file does not mention the query_on_not_found option
although it is still present.

The intented behavior is that the unknown user is only queried when no other
other criterions were matching. A fall-through for authenticated users should
not happen.

agdsn/hades,agdsn/hades,agdsn/hades,agdsn/hades,agdsn/hades