protected HttpServerCodec createHttpServerCodec() {
        return new HttpServerCodec(MAX_INITIAL_LINE_LENGTH.get(), MAX_HEADER_SIZE.get(), MAX_CHUNK_SIZE.get(), false);
    }
Call {@link #BaseZuulChannelInitializer(String, ChannelConfig, ChannelConfig, ChannelGroup)} instead.
zuul-core/src/main/java/com/netflix/zuul/netty/server/BaseZuulChannelInitializer.java