Drupal: Allow for Node Type specific html.tpl.php files (e.g., html--story.tpl.php, html--page.tpl.php, html--webform.tpl.php)

preprocess.inc

<?php

/**
 * Implementation of hook_preprocess_html().
 */
function MYTHEME_preprocess_html(&$variables, $hook) {

  if ($node = menu_get_object()) {
    if (isset($node->type)) {
      $variables['theme_hook_suggestions'][] = 'html__' . str_replace('_', '--', $node->type);
    }
  }

}