Add two new options to cron(8), -J and -j. They allow to specify

Add two new options to cron(8), -J and -j.  They allow to specify
the maximum amount of time jitter for root and other users, respectively.
Before starting a job, cron(8) will sleep a random number of seconds,
from 0 to the amount specified.  This can help to smooth down load spikes
when a lot of jobs are to start at the beginning of a particular minute
(e.g., the first minute of an hour.)

PR:		bin/66474
Submitted by:	Dmitry Morozovsky <marck <@> rinet.ru>