tl;dr: If you have
/etc/fwupd/remotes.d/lvfs.conf then you need to nag your distribution to update the fwupd package to 1.0.6.
Slightly longer version:
The current CDN (~$100/month) is kindly sponsored by Amazon, but that won’t last forever and the donations I get for the LVFS service don’t cover the cost of using S3. Long term we are switching to a ‘dumb’ provider (currently BunnyCDN) which works out 1/10th of the cost — which is covered by the existing kind donations. We’ve switched to use a new CNAME to make switching CDN providers easy in the future, which means this should be the only time this changes client side.
If you want to patch older versions of fwupd, you can apply this commit.