Update the system sysctls to not harvest data from interrupts, point-to-point interfaces and ethernet devices.
Update the system sysctls to not harvest data from interrupts, point-to-point interfaces and ethernet devices.

The sysctl names changed in FreeBSD 11.

dennypage/pfsense,phil-davis/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,dennypage/pfsense,pfsense/pfsense,dennypage/pfsense,ptorsten/pfsense,ptorsten/pfsense,pfsense/pfsense,NewEraCracker/pfsense,ptorsten/pfsense,NewEraCracker/pfsense,NewEraCracker/pfsense,pfsense/pfsense,phil-davis/pfsense,pfsense/pfsense,phil-davis/pfsense,dennypage/pfsense