Constants.php: add DIRTY_EXPIRE

extension/qfq/qfq/Constants.php

@@ -1107,7 +1107,8 @@ const DIRTY_MODE_EXCLUSIVE = 'exclusive';
 const DIRTY_MODE_ADVISORY = 'advisory';
 const DIRTY_MODE_NONE = 'none';
 const DIRTY_QFQ_USER_SESSION_COOKIE = 'qfqUserSessionCookie';
-const DIRTY_FE_USER= 'feUser';
+const DIRTY_FE_USER = 'feUser';
+const DIRTY_EXPIRE = 'expire';
 const DIRTY_REMOTE_ADDRESS = 'remoteAddress';
 const DIRTY_API_ACTION = 'action';  // Name of parameter in API call of dirty.php?action=...&s=...
 const DIRTY_API_ACTION_LOCK = 'lock';