title: GitLab LDAP login with single sign-on and auto blocking
body: <p>I'm trying to conifigure my GitLab CE install, so users can only log in using LDAP, GitLab creates their account automatically but blocks them until the administrator approves.  My LDAP config is working fine, but LDAP users are not blocked and the standard login is still shown.</p>
  
  <pre><code>gitlab_rails['allow_single_sign_on'] = true
  gitlab_rails['block_auto_created_users'] = true
  gitlab_rails['signin_enabled'] = false
  gitlab_rails['signup_enabled'] = false
  </code></pre>
  
  <p>I've tried 7.3.2 and 7.4.0.  I'm using the omnibus install.
  Thanks.</p>