Maintenance of openwrt.org and CDN for downloads

[Paul Spooren]

Hi Daniel,

> thank you for that important (and long due) work nobody wanted to do.
> I've noticed that the SSL certificate now only lists openwrt.org and
> there isn't a SubjectAltNames for www.openwrt.org, hence when trying
> to access via the www. subdomain you get to see a certificate error.
> Probably just a matter of including the additional names in the ACME
> setup for letsencrypt and easy to fix.
> 
> I would also recommend to setup redirection from www.openwrt.org to
> openwrt.org or vice versa to have it clear to eveybody and every bot
> that the content of the two subdomains (with and without www) is
> identical.

I added the certs and a redirect, please report on further issues!

Best,
Paul