Support protocol-relative URLs

diff --git a/include/functions.php b/include/functions.php
index a3de2461d5472b9ecd280ec32695801087fbb32d..394f540c95f21a9a8a5cd694f9f64b90107b18f7 100644 (file)
--- a/include/functions.php
+++ b/include/functions.php
@@ -4800,6 +4800,9 @@
                        return $rel_url;
                } else if (strpos($rel_url, "://") !== false) {
                        return $rel_url;
+               } else if (strpos($rel_url, "//") === 0) {
+                       # protocol-relative URL (rare but they exist)
+                       return $rel_url;
                } else if (strpos($rel_url, "/") === 0)
                {
                        $parts = parse_url($url);