@Override
    protected void addHttpRelatedHandlers(ChannelPipeline pipeline) {
        pipeline.addLast(stripInboundProxyHeadersHandler);
    }
Use {@link #PushChannelInitializer(String, ChannelConfig, ChannelConfig, ChannelGroup)} instead.
zuul-core/src/main/java/com/netflix/zuul/netty/server/push/PushChannelInitializer.java