return absolute URLs from l() and url() (and others?)

Since version 4.7.0 Drupal removes tag and placed to all links slash before (/node/1). This works, but it cause, that search engines like google doesn't indexing subpages (of course with CleanURL activated) like (/node/5).
It is possible to add option, to enable absolute urls to all drupal links? Because, when I changed function url to return only absolut url, google start to indexing subpages. Or it will be possible, back to base href tag and remove slash?
Another problem is, when I change function "url()", and function to returns base_href, it works only for links (in nodes), but not for images. And also it doesn't work for forms, it still have "/action" without domain.