[$] Maintaining the kernel's web of trust

A typical kernel development cycle involves pulling patches from over 100repositories into the mainline. Any of those pulls could conceivablybring with it malicious code, leaving the kernel (and its users) open tocompromise. The kernel's web of trust helps maintainers to ensure thatpull requests are legitimate, but that web has become difficult to maintainin the wake of the recent attacks on keyservers and other problems. So now the kernel community istaking management of its web of trust into its own hands.