Habilitación de SPDY y Strict-Transport-Security para NginX en Ubuntu 14.04

En Ubuntu 14.04, NginX se compila con la capacidad SPDY. Para usarlo hay que habilitarlo dentro del servidor {…} bloque para cada host virtual.
p. ej.
server {
server_name mprofi.com www.mprofi.com;
root /var/www/mprofi.com;
index index.php;
#
# Added to handle HTTP and HTTPS and SPDY
listen 80;
listen 443 ssl spdy;
ssl_certificate /etc/letsencrypt/live/www.mysite.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/www.mysite.com/privkey.pem;
#
# ENABLE STRICKT TRANSPORT SECURITY and X-Frame-Options
add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
add_header X-Frame-Options "DENY";
}


Reiniciar NginX
service nginx restart