because varnish developer don't think it's a good idea.
and it's visibly not a priority for centos web panel developers to have a solution really quick with ssl certificate,
well in fact, I think it's really hard to code something where certificates work with all possibles configurations (apache, apache and nginx, and others)
But there are working for a config just with nginx (faster than just apache and not so far to varnish performances)
I wait also...