Optionally manages the communications with external programs / internal modules used to generate dynamic content; implementing HTTP/2 was considered a task of overwhelming complexity that could open the door to a whole new class of bugs that till 2015 did not exist and so it would have required notable investments https://cpc-kosten-pro-klick42837.humor-blog.com/27517758/die-grundprinzipien-der-a-b-tests