Simplified Nginx Proxy for Google URLs in WordPress

In Nginx proxy for Google URLs in WordPress, I wrote lots of lines configuring proxies and subs_filter rules.
Here is the newer simplified one:

Updated(2014-09-19):

Simplified Nginx Proxy for Google URLs in WordPress by @sskaje: https://sskaje.me/2014/01/simplified-nginx-proxy-google-urls-wordpress/

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