Mention Chrome DNS and new firmwarepasswd option. Fix 354. Fix 350.
Mention Chrome DNS and new firmwarepasswd option. Fix 354. Fix 350.

drduh/OS-X-Yosemite-Security-and-Privacy-Guide,ScheerMT/OS-X-Yosemite-Security-and-Privacy-Guide,drduh/macOS-Security-and-Privacy-Guide,drduh/OS-X-Security-and-Privacy-Guide