What happened to this sysctl? It appears that some stuff depends on
this setting, e.g. kqemu. There is only a hpet.max-user-freq now and
I get this funky permission error on 'sysctl -a':
# /sbin/sysctl -a | grep freq
error: permission denied on key 'kernel.sched_nr_migrate'
dev.hpet.max-user-freq = 64
# /sbin/sysctl -n -q dev.rtc.max-user-freq
error: "dev.rtc.max-user-freq" is an unknown key