[arch-devops] Upgrade SSL CAs to SHA-2

Hello, I upgraded the luna intermediate CA and RootCA to the new StartSSL certs with SHA-2 signatures. The *.archlinux.org certs is still using SHA-1 signature (so no green bar) which expire this April. Should we move to Letsencrypt or do we still want to use the star certificate? Cheers, -- Sébastien "Seblu" Luttringer https://seblu.net | Twitter: @seblu42 GPG: 0x2072D77A