OpenVPN and native OTP support with google authentication

[bbrendon]

Merry Xmas to us?

https://github.com/evgeny-gridasov/openvpn-otp/issues/18#issuecomment-319538894

Who is going to be first to get it running in pfSense? The race is on :)

[jimp]

Install the FreeRADIUS3 package and setup OTP/GA in there, and setup OpenVPN to hit that for auth, and use it today. No need to use an extra OpenVPN plugin or to reinvent the wheel.