The correct notation of "nginx"
I was always stumped about how to describe "nginx" in text.
In official site, "nginx" and "NGINX" is used. After I got rattled, I asked in ML.
http://mailman.nginx.org/pipermail/nginx/2013-October/040887.html
Accorting to nginx core developer, Preferred variant is "nginx". So I'll use "nginx".