Byte Range說明參考RFC 2616：http://www.ietf.org/rfc/rfc2616.txt
14.35 Range ....................................................138 14.35.1 Byte Ranges ...........................................138 14.35.2 Range Retrieval Requests ..............................139
相關背景說明參考：
http://seclists.org/fulldisclosure/2011/Aug/175
http://lwn.net/Articles/456268/
http://httpd.apache.org/security/CVE-2011-3192.txt
