补充：补充lua-resty-lock库的基本使用方法、使用技巧以及性能优化技巧

[Miss-you]

https://yousali.me/openresty-best-practices/lock.html 该页面的lock页面是空的，没有讲解lua-resty-lock如何使用

[pixeldin]

The uri above which refer to seems already broken. Latest addres: https://moonbingbing.gitbooks.io/openresty-best-practices/content/lock.html

[membphis]

welcome to contribute PR