Add onion location

src/lib/constants.js

@@ -20,6 +20,9 @@ let constants = {
 	port: 10407,
 	// You MUST read /src/site/pug/privacy.pug.template before changing has_privacy_policy!
 	has_privacy_policy: false,
+	// If your instance is also available as an onion site, add the onion URL here.
+	// It should look something like "http://3gldbgtv5e4god56.onion" (no trailing slash).
+	onion_location: "http://3gldbgtv5e4god56.onion",
 
 	// Things that server owners _could_ change if they want to.
 	tor: {