Changed validator to warn about malformed CurrentControlSet Registy key

ForensicArtifacts#216

tools/validator.py

@@ -89,6 +89,15 @@ def CheckFile(self, filename):
                     filename, artifact_definition, source)):
               result = False
 
+            for key_path in source.keys:
+              key_path = key_path.upper()
+              if key_path.startswith(u'%%CURRENT_CONTROL_SET%%'):
+                logging.warning((
+                    u'Artifact definition: {0} in file: {1} contains Windows '
+                    u'Registry key path that starts with '
+                    u'%%CURRENT_CONTROL_SET%%').format(
+                        artifact_definition.name, filename))
+
     except errors.FormatError as exception:
       logging.warning(
           u'Unable to validate file: {0} with error: {1}'.format(