title: Can't disable user signup in Grafana
body: <p>I'm using Grafana v2.6.0 on a Centos server. In /etc/grafana/grafana.ini, I set allow sign_up to false:</p>
  
  <pre><code>[users]
  ;allow_sign_up = false
  </code></pre>
  
  <p>Then I restarted grafana-server.</p>
  
  <p>When I go to the login page, the signup tab is still visible, and when I look at settings in the grafan app, allow_sign_up is still true.   How do I disable signup?</p>