Add noreferrerLinks and hrefTargetBlank.

config.yaml

@@ -3,6 +3,10 @@ languageCode: en-us
 title: Briar
 theme: briar
 
+blackfriday:
+  noreferrerLinks: true
+  hrefTargetBlank: true
+
 Params:
   flatterid: 4pq200