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I'm an Arch Linux user and use your mirror (thanks!). I noticed that by default your mirror is designated as http://mirror.aarnet.edu.au/pub/archlinux in my package manager configuration file but it is also available from https://mirror.aarnet.edu.au/pub/archlinux with a valid (EV) SSL certificate. May I suggest you advertise your mirror as HTTPS to the Arch Linux maintainers?
I've CC'd arch-mirrors@archlinux.org in on this email. I suspect this is who you'll need to email to make this happen.