Forcing secure links. Again.

inside/functions.php

@@ -1675,7 +1675,7 @@ function site_root() {
  * @source http://gravatar.com/site/implement/images/php/
  */
 function get_gravatar( $email, $s = 80, $d = 'mm', $r = 'g', $img = false, $atts = array() ) {
-    $url = 'http://www.gravatar.com/avatar/';
+    $url = 'https://www.gravatar.com/avatar/';
     $url .= md5( strtolower( trim( $email ) ) );
     $url .= "?s=$s&d=$d&r=$r";
     if ( $img ) {