[$] Improving the handling of embargoed hardware-security bugs

Jiri Kosina kicked off a session on hardware vulnerabilities at the 2018Kernel Maintainers Summit by noting that there are few complaints about howthe kernel community deals with security issues in general. That does nothold for Meltdown and Spectre which, he said, had been "completelymishandled". The subsequent handling of the L1TF vulnerability suggests that some lessonshave been learned, but there is still plenty of room for improvement in howhardware vulnerabilities are handled in general.