Upgrade latest nginx mainline for HTTP/2 support


#1

As of Nginx 1.9.5 HTTP/2 support is baked in. At this time the current mainline version is 1.9.14.

According to http://serverfault.com/questions/715049/what-s-the-difference-between-the-mainline-and-stable-branches-of-nginx/715126

Thoughts?