title: Activating the Flask debugger when running under mod_wsgi
body: <p>How can I activate the Flask debugger when running under mod_wsgi?</p>
  
  <p>I have <code>DEBUG</code>, <code>PROPAGATE_EXCEPTION</code> and <code>PRESERVE_CONTEXT_ON_EXCEPTION</code> set to <code>True</code>, but still the debugger doesn't appear on exceptions.</p>