[feature] Use Piwik "js/" approach for same origin tracking

Hi there,

I'm setting up our gitlab instance so that it serves the piwik javascript from the same dns name. However uBlock still blocks it. The piwik documentation offers to use "js/" as an alias for downloading the javascript. https://github.com/piwik/piwik/blob/master/js/README.md

Would it be possible to offer this as an option?