ITS#5810: exclude instead of include backends, explain exclusion

tests/scripts/test006-acls

@@ -13,11 +13,8 @@
 ## top-level directory of the distribution or, alternatively, at
 ## <http://www.OpenLDAP.org/license.html>.
 
-case "$BACKEND" in
-bdb|hdb)
-	;;
-*)
-	echo "Test does not support $BACKEND backend"
+case "$BACKEND" in ldif | null)
+	echo "$BACKEND backend does not support access controls, test skipped"
 	exit 0
 esac
 

tests/scripts/test041-aci

@@ -13,11 +13,8 @@
 ## top-level directory of the distribution or, alternatively, at
 ## <http://www.OpenLDAP.org/license.html>.
 
-case "$BACKEND" in
-bdb|hdb)
-	;;
-*)
-	echo "Test does not support $BACKEND backend"
+case "$BACKEND" in ldif | null)
+	echo "$BACKEND backend does not support access controls, test skipped"
 	exit 0
 	;;
 esac

tests/scripts/test058-syncrepl-asymmetric

@@ -111,10 +111,8 @@
 # environment variable RACE_TESTS can be set to the number of race test
 # iterations the script should perform.
 
-case "$BACKEND" in
-bdb|hdb)
-	;;
-*)
+case "$BACKEND" in ldif | null)
+	# LDIF lacks ACL support, NULL lacks cn=config support
 	echo "This test does not support the $BACKEND backend"
 	exit 0;;
 esac