SimplePie seems to only supports HTTP schemes

Can simplify the regex (faster because anchored) for cleaning URLs based
on the fact that we only have to deal with HTTP or HTTPS

lib/SimplePie/SimplePie/Misc.php

@@ -2248,7 +2248,7 @@ function embed_wmedia(width, height, link) {
 	 */
 	function url_remove_credentials($url)	//FreshRSS
 	{
-		return preg_replace('#(?<=//)[^/:@]+:[^/:@]+@#', '', $url);
+		return preg_replace('#(?<=^https?://)[^/:@]+:[^/:@]+@#', '', $url);
 	}
 }