Nginx + https + 免费SSL证书配置指南
http://my.oschina.net/shootercn/blog/16712

生成证书:

server {    server_name YOUR_DOMAINNAME_HERE;    listen 443;    ssl on;    ssl_certificate /usr/local/nginx/conf/server.crt;    ssl_certificate_key /usr/local/nginx/conf/server.key;}