title: caddy use placeholder error
body: <p>i want to write one config for multiple sites.<br>
  these sites domain will like : x.localhost, y.localhost<br>
  but occur some errors.<br>
  this is error message:</p>
  
  <blockquote>
    <p>caddy_1                | 18/Jan/2018:09:33:43 +0000 [ERROR 0 /index.php] Primary script unknown</p>
    
    <p>caddy_1                | 172.20.0.1 - - [18/Jan/2018:09:33:43 +0000] "GET /index.php HTTP/1.1" 404 40</p>
    
    <p>caddy_1                | xxx.localhost</p>
  </blockquote>
  
  <pre><code>*.localhost:80 {
      root /var/www/{hostonly}/public
      fastcgi / php-fpm:9000 php {
          index index.php
      }
      rewrite {
          to {path} {path}/ /index.php?{query}
      }
      gzip
      browse
      log stdout
      errors stdout
      log / stdout {hostonly}
  }    
  </code></pre>