Allow original without cd name

couchpotato/core/plugins/renamer.py

@@ -220,7 +220,7 @@ class Renamer(Plugin):
         nfo_name = self.conf('nfo_name')
         separator = self.conf('separator')
 
-        cd_keys = ['<cd>','<cd_nr>']
+        cd_keys = ['<cd>','<cd_nr>', '<original>']
         if not any(x in folder_name for x in cd_keys) and not any(x in file_name for x in cd_keys):
             log.error('Missing `cd` or `cd_nr` in the renamer. This will cause multi-file releases of being renamed to the same file.'
                       'Force adding it')