title: How do I include a file in Apache config without generating an error when it doesn't exist?
body: <p>This is for a shared config file that should include another file if it exists, but still work otherwise. If I do</p>
  
  <pre><code>Include foo.conf
  </code></pre>
  
  <p>and foo.conf doesn't exist, apache will complain:</p>
  
  <pre><code>could not open document config file /etc/httpd/conf/foo.conf
  </code></pre>