add hint about example vhost config to README

README.md

@@ -9,6 +9,7 @@ Quick & Dirty Instructions:
   - Make that vHost also respond on a wildcard subdomain (ServerAlias cdn*.example.com)
   - Configure Apache to use port 81 
   - Configure Varnish to use port 80 
+  - Check the included vHost config ('examples/vhost.conf') if you plan on using HTTPS
   - Use the included Varnish VCL ('examples/varnish.vcl') for caching all images for 1 week if the request was made to one of the CDN hosts
   - Put all files into the DocumentRoot of the vHost you created
   - Make sure mod_rewrite is enabled (a2enmod rewrite) and that you are allowed to use the .htaccess file in the DocumentRoot of the vHost (AllowOverride All)