To help with setting random Authenticator value
These attributes were sourced from: http://www.cisco.com/en/US/docs/ios/12_2/security/configuration/guide/scfrdat1.html#wp1038515
Implemented correct Response Authenticator calculation for Access-* packets (Access-Accept, Access-Reject, and Access-Challenge) in a new method: Radius::Packet#access_response_authenticator() I believe the existing Packet.auth_resp() method is broken.
I needed type 66 (Tunnel-Client-Endpoint) to connect to a Cisco ASA, and decided to add the rest of the attributes while I was at it. Reference: http://www.iana.org/assignments/radius-types/radius-types.xml