title: Linking to the django admin site
body: <p>Very basic question, but I'm having trouble tracking down the answer on the web. I have a template, which I want to link to the django admin site (i.e. localhost:8000/admin). What is the code for this?</p>
  
  <p>I'm imagining something like</p>
  
  <pre><code>&lt;a href="{% url admin.site.root %}"&gt;link to admin panel&lt;/a&gt;
  </code></pre>
  
  <p>However, when I try the above snippet I get:</p>
  
  <pre><code>Caught an exception while rendering:
    Reverse for 'project_name.django.contrib.admin.sites.root' with
    arguments '()' and keyword arguments '{}' not found.
  </code></pre>
  
  <p>Help?</p>