CDN friendlyness

[szepeviktor]

Hello!

ROCKET_LL_ASSETS_URL etc. URL-s are defined very early: thus CDN MU/plugins are not able to alter the URL of e.g. lazyload.min.js

Please use core functions (plugins_url, content_url) at the time of outputting the script tag. Thank you.

[remyperona]

Hi,

We're going to move away from constants like this at some point, so it will be something we're going to fix at the same time :)