title: django: put related_name in admin - only as a list of links
body: <p>Seems like this'd be obvious - maybe it is... how can I put related_name into the admin?</p>
  
  <p>If I have</p>
  
  <pre><code>class A(Model):
     whatever
  
  class B(Model):
     a = ForeignKey(A, related_name='bs')
  </code></pre>
  
  <p>In the admin for B, 'a' shows up nicely. In the admin for A, how can I make the list 'bs' show up? I don't need to support inline editing, and the normal way of doing this (TabularInline) also shows more items in the 'bs' list than actually exist. Ideally, it would just show a list of hyperlinks to the relevant B objects...</p>