Supports custom netty ChannelDuplexHandler

[killme2008]

Is your feature request related to a problem? Please describe.

I want to implement the protocol in HTTP pipeline semantic, just like

https://github.com/spinscale/netty4-http-pipelining/blob/master/src/main/java/de/spinscale/netty/http/pipelining/HttpPipeliningHandler.java

But there is no way to add a such custom ChannelDuplexHandler to netty under bolt framework.

Describe the solution you'd like

1. Supports user custom netty ChannelDuplexHandler to be added.
2. Or a bolt pipeline handler to be extendted that wraps netty handler, do not export netty directly.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

[Viyond]

focus..