Url rewrite to get rid of www. sub-domain, works on sub-sub-domains too

web.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    ...
  <system.webServer>
      ...
    <rewrite>
        ...
      <rules>
          ...
        <rule name="Redirect from WWW" stopProcessing="true">
          <match url="(.*)" />
          <conditions>
            <add input="{HTTP_HOST}" pattern="^www\.(.*)$" />
          </conditions>
          <action type="Redirect" url="https://{C:1}/{R:1}" redirectType="Permanent" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>