[$] The return of the lockdown patches

It's been a year since we looked in on the kernel lockdown patches; that's because things have been fairly quiet on that front since there was a loud and discordant dispute about them back then. But Matthew Garrett has been posting new versions over the last two months; it would seem that the changes that have been made might be enough to tamp down the flames and, perhaps, even allow them to be merged into the mainline.