Add profile sort_by to sample LDAP module config

Author: ndptech

raddb/mods-available/ldap

@@ -328,7 +328,7 @@ ldap {
 		#  sorting order will be reversed for that attribute.
 		#
 		#  * If `sort_by` is set, and the server does not support sorting
-		#  the search will fail.
+		#  or the attributes do not have an ORDERING rule, the search will fail.
 		#
 		#  * If a search returns multiple user objects and `sort_by` is not
 		#  set, the search will fail.
@@ -557,6 +557,21 @@ ldap {
 		#  is successful.
 		#
 #		attribute_suspend = 'radiusProfileDn'
+
+		#
+		#  sort_by:: Server side result sorting.
+		#
+		#  A list of space delimited attributes to order the result set by,
+		#  controlling the sequence that profiles are applied if the filter
+		#  returns more than one object.
+		#
+		#  * If the attribute name is prefixed with a hyphen '-' the
+		#  sorting order will be reversed for that attribute.
+		#
+		#  * If `sort_by` is set, and the server does not support sorting
+		#  or the attributes do not have an ORDERING rule, the search will fail.
+		#
+#		sort_by = 'radiusProfilePriority'
 	}
 
 	#