[pcp] issue#62: Client-driven or server-driven auth retransmissions

[Alper Yegin <[e-mail]>]

EAP is a server-driven request/response type protocol.
Defining an EAP lower-layer that's client driven is not trivial, maybe not even possible (to-be seen). 
Sam initiated a discussion on the ABFAB WG mailing list on this matter, and there seems to be issues there (a single packet stalling the protocol flow, see http://www.ietf.org/mail-archive/web/abfab/current/msg01746.html)

Furthermore, as more details of client-driven solution discussed, it became apparent that server still needs to maintain state even when the client is driving the rexmits. So, there are no savings there. In fact, if the savings are targeted at the "PCP implementation", then offloading the authentication to PANA is much more attractive.