[$] Removing the Linux /dev/random blocking pool

The random-number generation facilities in the kernel have been reworkedsome over the past few months-but problems in that subsystem have beenaddressed over an even longer time frame. The most recent changes were made to stop the getrandom() system call fromblocking for long periods of time at system boot, but the underlying causewas the behavior of the blocking random pool. A recent patch set wouldremove that pool and it would seem to be headed for the mainline kernel.