Rebase sigsum branch on main, update deployed .cfg file
See what was added in !2 (merged).
Just tried the rebase, should apply cleanly expect for one line in the README which is unrelated to the above MR and trivial to resolve (looks like something we had in our sigsum branch had also made it into main, yay).
Perhaps you do the actual rebase @linus when you also update the .cfg file that is deployed for Sigsum's checker? (Requires updating so that imap/smp user and pass variables are used.)
Please assign yourself if this sounds good to you.