While working on
MDL-54901 I faced various (unrelated!) problems with some tests instantiating the page_requirements_manager.
There, external yui loading ($CFG->useexternalyui) is beind "manually" disabled with comment:
But I've seen this one available/used in a number of places:
So this is just to concile the comment and the reality. Note I haven't looked if that URL is official, supported, works or not... just found it looking for "yui ssl cdn" out there (drupal, stackoverflow...).
Also, somehow related... I've seen yui stuff being served from clouflare cdn and/or goggle too...
Anyway, issue created, I'm happy with any outcome, just wanted to be sure the comment and behaviors are correct.