Here is what I have so-far, but I'm not sure how to go back.
location ~ ^/(secure) {
if ($scheme = 'http') {
#Insecure, lets go to https
rewrite ^/(.*)$ https://$host/$1 permanent;
}
}
Posted at Nginx Forum: http://forum.nginx.org/read.php?2,24495,24496#msg-24496