html.tpl.php and maintenance-page.tpl.php both have hardcoded meta tags that don't add anything to browsers except Windows Mobile see #1717090: Remove the http-equiv="cleartype" meta tag
This patch adds conditionals around them so pages will validate
Let's follow what core does #1717090: Remove the http-equiv="cleartype" meta tag even though that's been stalled for a month. Patch will have to be rerolled against dev when the time comes. Thanks, Adam!
We've decided to remove that metatag for Drupal 8 because we won't be supporting those old mobile Windows phones.
But I think we should support them on Drupal 7. Opinions?
Didn't mean to move it to the new branch.
Drupal is a registered trademark of Dries Buytaert.