New EAP method: EAP-AKA.

We' just added EAP-AKA to the v4.0.x branch. This method is similar to EAP-SIM, and is mainly used in the telco industry, especially in WiFi hand-off. This work was sponsored by a telco who wishes to remain anonymous. We have another popular EAP method coming soon, too. The new EAP methods will not be available in version 2.x or version 3.0, as those are stable versions which have no new features. They will be available in the v4.0.x branch, which has other new features which the methods need. Alan DeKok.