Add signal.onabort handler to AbortController
Created by: piersoh
Added missing signal.onabort
in Fetch AbortController setup. The required onabort action to be called is the httpRequest.onabort() handler which deals with the abort cleanup and re-start logic for the media - as perfomed by the XHRLoader.
It leads to a question about how one handles the [legacy?] Chrome behaviour - see Pull Request: https://github.com/Dash-Industry-Forum/dash.js/pull/3235