bit of a minor issue, but could the various github repos update their "Website" link to use https ? i can't send a PR to change this.
if you go to https://github.com/libarchive/libarchive and look at the "Multi-format archive and compression library" text, there will be a link to the right "http://www.libarchive.org".
iiuc, you need to be an admin for the repo in order to see the "Edit" button to the right of that to update the link.
this applies to https://github.com/libarchive/libarchive.org and https://github.com/libarchive/cdash too.