Remove 512 bit option from OpenVPN wizard.
Remove 512 bit option from OpenVPN wizard.

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