netty3.5.11 final 发布了，官方消息请看这里。
这是一个 bugfix 版本，重要的 bug 包括：
- [#723] Prevent loss of events when shutdown ExecutionHandler
- [#729] WebSocketClientHandshaker* does not handle urls with non abs_path correctly
- [#734] NPE is thrown and ChannelFuture is NOT notified if an unsupported message type is written to the Channel
- [#735] WebSocketClientHandshaker08 / WebSocketClientHandshaker13 may notify ChannelFuture before the right encoder is present
- [#755] Fix header block values truncation in decompression when using SPDY
- [#761] Fix possible NPE in cleanupWriteBuffer when closing Channel