commit 9e690efd19dc854fce0a28ad3a1cc6dffcc235c2
Author: Miro Dietiker <miro.dietiker@md-systems.ch>
Date:   Sun May 18 12:50:57 2014 +0200

    Add #path and #href support for links.

diff --git a/core/includes/common.inc b/core/includes/common.inc
index 07ec3cb..99d3a9d 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -2949,6 +2949,9 @@ function drupal_pre_render_link($element) {
     $element['#route_parameters'] = empty($element['#route_parameters']) ? array() : $element['#route_parameters'];
     $element['#markup'] = \Drupal::linkGenerator()->generate($element['#title'], $element['#route_name'], $element['#route_parameters'], $element['#options']);
   }
+  else if(isset($element['#path'])) {
+    $element['#markup'] = l($element['#title'], $element['#path'], $element['#options']);
+  }
   else {
     $element['#markup'] = l($element['#title'], $element['#href'], $element['#options']);
   }