hotline #13167 OPDS: Do not consider <link> with rel="start"

Atramenta OPDS catalogue entries have two links. The one with
rel="start" links to the root element so we have to ignore it.

library/Class/WebService/OPDS/CatalogReader.php

@@ -118,6 +118,10 @@ class Class_WebService_OPDS_CatalogReader {
 			return;
 		}
 
+		if (array_key_exists('REL', $attributes) && $attributes['REL'] == 'start') {
+			return;
+		}
+
 		if (false === strpos($attributes['TYPE'], 'application/atom+xml'))
 			return;
 
@@ -201,4 +205,4 @@ class Class_WebService_OPDS_CatalogReader {
 		return $normalized . dirname($urlInfos['path']) . $url;
 	}
 }
-?>
\ No newline at end of file
+?>