[prefetch.tentative.https.sub.html]
  [<link rel='prefetch' href='https://www.web-platform.test:8443/...'>]
    expected: FAIL

  [<link rel='prefetch' href='https://www.not-web-platform.test:8443/...'>]
    expected: FAIL

  [<link rel='prefetch' href='https://web-platform.test:8443/...'>]
    expected: FAIL

