protected void addHttp1Handlers(ChannelPipeline pipeline) {
        pipeline.addLast(HTTP_CODEC_HANDLER_NAME, createHttpServerCodec());

        pipeline.addLast(new Http1ConnectionCloseHandler());
        pipeline.addLast(
                "conn_expiry_handler",
                new Http1ConnectionExpiryHandler(
                        maxRequestsPerConnection, maxRequestsPerConnectionInBrownout, connectionExpiry));
    }
Call {@link #BaseZuulChannelInitializer(String, ChannelConfig, ChannelConfig, ChannelGroup)} instead.
zuul-core/src/main/java/com/netflix/zuul/netty/server/BaseZuulChannelInitializer.java