new features proposal: afraid ddns and traffic graphs on home page

[mar.ste]

Just willing to propose to add the very interesting "afraid.org" service in the ddns section (info at https://freedns.afraid.org/dynamic/) and propose to include some of the available traffic monitor graphs in the status tab on the main page (below CPU and RAM ones).

I think they should not extremely difficult among the nice to have ones. Anyway they are unrelated and can be implemented in different time or alternatively.