/etc/freeradius/modules/opendirectory is in freeradius 2.1.12+dfsg-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 | # -*- text -*-
#
#  $Id$
#  This module is only used when the server is running on the same
#  system as OpenDirectory.  The configuration of the module is hard-coded
#  by Apple, and cannot be changed here.
#
#  There are no configuration entries for this module.
#
opendirectory {
}
 |