AVP EAP-KEY name support in FR

[Alan DeKok]

Alan DeKok wrote:
>   Ah... it's a typo.  The file dictionary.rfc4072 had the attribute as
> "string" instead of "octets".

  And only for 3.0, not 2.2.  :(

  I had committed a fix a year ago to the 2.2 branch, and didn't bring
it over to 3.0.

  Alan DeKok.