This file is indexed.

/etc/freeradius/sites-available/control-socket 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.

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# -*- text -*-
######################################################################
#
#	Control socket interface.
#
#	HIGHLY experimental!  It should NOT be used in production
#	environments.
#
#	In the future, we will add username/password checking for
#	connections to the control socket.  We will also add
#	command authorization, where the commands entered by the
#	administrator are run through a virtual server before
#	they are executed.
#
#	For now, anyone who has permission to connect to the socket
#	has nearly complete control over the server.  Be warned!
#
#	This functionality is NOT enabled by default.
#
#	See also the "radmin" program, which is used to communicate
#	with the server over the control socket.
#
#	$Id$
#
######################################################################
listen {
	#
	#  Listen on the control socket.
	#
	type = control

	#
	#  Socket location.
	#
	#  This file is created with the server's uid and gid.
	#  It's permissions are r/w for that user and group, and
	#  no permissions for "other" users.  These permissions form
	#  minimal security, and should not be relied on.
	#
	socket = ${run_dir}/${name}.sock

	#
	#  The following two parameters perform authentication and
	#  authorization of connections to the control socket.
	#
	#  If not set, then ANYONE can connect to the control socket,	
	#  and have complete control over the server.  This is likely
	#  not what you want.
	#
	#  One, or both, of "uid" and "gid" should be set.  If set, the
	#  corresponding value is checked.  Unauthorized users result
	#  in an error message in the log file, and the connection is
	#  closed.
	#

	#
	#  Name of user that is allowed to connect to the control socket.
	#
#	uid = radius

	#
	#  Name of group that is allowed to connect to the control socket.
	#
#	gid = radius

	#
	#  Access mode.
	#
	#  This can be used to give *some* administrators access to
	#  monitor the system, but not to change it.
	#
	#	ro = read only access (default)
	#	rw = read/write access.
	#
#	mode = rw
}