Change the favicon of the Sphinx Read The Docs theme? : <p>I'm already using a custom css to override some of the styles of the theme using </p>

<pre><code>def setup(app):
    app.add_css_file('custom.css')
</code></pre>

<p>This works fine. What other app. functions are available?
I can't find any documentation.</p>

<p>I'm looking for the function to override the favicon.</p>
