joomla/joomla-cms — pull request #1859 by pdxfixit (2013-08-29 19:35:48+00:00)
Title: fix for protocol-agnostic embedded URLs in content

Recently, YouTube changed the embed URLs provided, so that they are protocol agnostic;

While are, indeed, disallowed in *most* cases, the concept of a protocol-agnostic URL is not new, and continues to rise in prominence.

This fix should prevent URLs like the one shown above, from having JURI::base() concatenated to the beginning.