Update README.md

redisson-tomcat/README.md

@@ -25,6 +25,8 @@ Add `RedissonSessionManager` in global context - `tomcat/conf/context.xml` or pe
 
    `broadcastSessionEvents` - if `true` then `sessionCreated` and `sessionDestroyed` events are broadcasted across all Tomcat instances and cause all registered HttpSessionListeners to be triggered. Default is `false`.
    
+   `broadcastSessionUpdates` - if `true` and `readMode=MEMORY` then session updates are broadcasted across all Tomcat instances. Default is `false`.
+
    `updateMode` - Session attributes update mode. Two modes are available:
    * `DEFAULT` - session attributes are stored into Redis only through `Session.setAttribute` method. Default mode.
    * `AFTER_REQUEST` - all session attributes are stored into Redis after each request. It useful in case when some objects stored in session change own state without `Session.setAttribute` method execution.