Bump PREFERRED_NGINX_VERSION 1.4.0 -> 1.4.1
Bump PREFERRED_NGINX_VERSION 1.4.0 -> 1.4.1

Because http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html
jawj/passenger,jawj/passenger,jawj/passenger,jawj/passenger,jawj/passenger,jawj/passenger,jawj/passenger