fix Rel because empty url is not nice
fix Rel because empty url is not nice

piranha/gostatic,zhuharev/gostatic,holic/gostatic,greyhwndz/gostatic,zhuharev/gostatic,krpors/gostatic,greyhwndz/gostatic,piranha/gostatic,beni55/gostatic,beni55/gostatic,krpors/gostatic,holic/gostatic