Disable sql in post-auth

This reverts to not using sql for post-auth section, because it breaks
the authentication to freeradius.
The problem was observed when running ponsim tests, by comparing against
a working x86 deployment.
The conclusion was that the tpdock/freeradius:2.2.8 docker image
employed by the upstream charts, has been built almost 2 years ago,
meanwhile the sql option was enabled in 217ee94, hence our
iecedge/freeradius:2.2.8 image differs in this aspect.

Signed-off-by: Ciprian Barbu <ciprian.barbu@enea.com>

templates/default.template

@@ -472,7 +472,7 @@ post-auth {
 	#  After authenticating the user, do another SQL query.
 	#
 	#  See "Authentication Logging Queries" in sql.conf
-	sql
+#	sql
 
 	#
 	#  Instead of sending the query to the SQL server,