nginx 学习列表
http://agentzh.org/misc/nginx/agentzh-nginx-tutorials-zhcn.html#00-Foreword01
http://blog.csdn.net/SmartTony/article/details/8101046#comments
http://blog.s135.com/post/306/
http://www.cnblogs.com/xiaogangqq123/archive/2011/03/04/1971002.html