revert to evan's original code. add some research at the top of the file.
revert to evan's original code. add some research at the top of the file.

freshbooks/nginx-ey-balancer,freshbooks/nginx-ey-balancer,msva/nginx-ey-balancer,freshbooks/nginx-ey-balancer,msva/nginx-ey-balancer,msva/nginx-ey-balancer