seeing some encoder issues with DefaultFileRegion
don't tie response binding interface to full http response, resources may be chunked. chunked resources are then responsible for sending their own last chunk
don't define consts that netty already does (CharsetUtil), be sure to write back the connection header
stricter privacy, more netty constant usage, content length should be that of the response and _NOT_ of the request content, duh?
create less strings, these things are consts