Fixed socket:send() blocking coroutines.
	Added option --chunk-size to control socket:send().
quick_response_client adds the status string
Added option --reverse-proxy.
	Added option --trusted-reverse-proxies=host1,host2,...,hostn
Uses X-Real-IP instead of X-Forward-For.
Added X-Powered-By
Added script.instance()
	print() uses script.instance()