+ /**
+ * Simplified regex fragment for acceptable full WebFinger ID of a user
+ *
+ * We could probably use an email regex here, but mainly we are interested
+ * in matching it in our URLs, like https://social.example/user@example.com
+ */
+ const WEBFINGER_FMT = '[0-9a-zA-Z_]{1,64}\@[0-9a-zA-Z_-.]{3,255}';
+