Summary of changes:
2d979d2... If cert expires soon, ask for a new user certificate (*)
ac8faea... If cert expires soon, ask for a new user certificate (*)
49d794a... Rebuild for python-3.9 (*)
88e9b6d... Add 0001-Fix-the-bin-rfabipkgdiff-to-work-with-the-new-liba (*)
bf414b3... fedabipkgdiff is now in libabigail-fedora package, fedabipk (*)
(*) This commit already existed in another branch; no separate mail sent