Handle potentially-relative base element when getting favicon.

The base element's "href" attribute is not required to be absolute,
so rewrite relative to the site URL if it is relative.

See:
* https://www.w3.org/TR/html51/document-metadata.html#the-base-element
* https://html.spec.whatwg.org/multipage/semantics.html#the-base-element

diff --git a/include/functions.php b/include/functions.php
index 8ea8719cad59ce72582958263287fb4033005075..71a6be2e987c5c5579acfce7bfa2726902a23092 100644 (file)
--- a/include/functions.php
+++ b/include/functions.php
@@ -577,7 +577,7 @@
 
                        $base = $xpath->query('/html/head/base');
                        foreach ($base as $b) {
-                               $url = $b->getAttribute("href");
+                               $url = rewrite_relative_url($url, $b->getAttribute("href"));
                                break;
                        }