Sitecore: Setting the login page title

If you have multiple Sitecore sites or separate environments (e.g. Development, Test, Staging), a good way to tell them apart is by setting the title on the login page.

The best way of doing this is by creating a patch file with the following contents:

<configuration xmlns:patch="">
    <setting name="WelcomeTitle">
      <patch:attribute name="value">LOGIN PAGE TITLE GOES HERE</patch:attribute>