title: nginx more than one ssl configuration
body: <p>I config  the ssl in nginx.conf as following, and it works fine:</p>
  
  <pre><code>    server {
          listen 8443 ssl;
          ssl_certificate /usr/local/nginx/security/test.crt;
          ssl_certificate_key /usr/local/nginx/security/test.key;
          location / {
          }
      }
  </code></pre>
  
  <p>But the above configured ssl certificates do not support ie6, so i apply another group certificates, but it will be a gray lock ,not a green one.
  So i only want to use the new group certificates for ie6, for other browsers, i still want to use the old ones.
  I think if there are some code as bellow could solve my problem:</p>
  
  <pre><code>server {
      listen 8443 ssl;
      if ($http_user_agent ~ "MSIE 6.0" ) {
         ssl_certificate /usr/local/nginx/security/test_ie6.crt;
         ssl_certificate_key /usr/local/nginx/security/test_ie6.key;
      }else{
         ssl_certificate /usr/local/nginx/security/test.crt;
         ssl_certificate_key /usr/local/nginx/security/test.key;
      }
      location / {
      }
  }
  </code></pre>