Sitecore Patch File To Change Login Screen Background

gistfile1.txt

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <settings>
      <setting name="Login.BackgroundImageUrl">
        <patch:delete />
      </setting>
      <setting name="Login.BackgroundImageUrl" value="/path/to/images/new_wallpaper_filename.jpg" />
    </settings>
  </sitecore>
</configuration>