Disable relative URLs in feeds

CHANGELOG.md

@@ -1,4 +1,5 @@
 ### HEAD
+* Disable relative URLs in feeds ([#145](https://github.com/roots/soil/issues/145))
 * Switch from Google CDN to jQuery CDN ([#144](https://github.com/roots/soil/issues/144))
 
 ### 3.6.2: December 24th, 2015

lib/utils.php

@@ -6,6 +6,10 @@
  * Make a URL relative
  */
 function root_relative_url($input) {
+  if (is_feed()) {
+    return $input;
+  }
+
   $url = parse_url($input);
   if (!isset($url['host']) || !isset($url['path'])) {
     return $input;