New database object classes

Pair of objects which supported by Interbase/Firebird/Red Database:

db_exception - exception which can be thrown from PSQL
db_domain - named set of column attributes

policy/flask/access_vectors

@@ -806,6 +806,12 @@ inherits database
 	export
 }
 
+class db_exception
+inherits database
+
+class db_domain
+inherits database
+
 # network peer labels
 class peer
 {

policy/flask/security_classes

@@ -103,6 +103,8 @@ class db_procedure		# userspace
 class db_column			# userspace
 class db_tuple			# userspace
 class db_blob			# userspace
+class db_exception		# userspace
+class db_domain			# userspace
 
 # network peer labels
 class peer