[pcp] Stephen Farrell's Discuss on draft-ietf-pcp-proxy-08: (with DISCUSS)

["Stephen Farrell" <[e-mail]>]

Stephen Farrell has entered the following ballot position for
draft-ietf-pcp-proxy-08: Discuss

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DISCUSS:
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I have one thing I'd like to check. Maybe this just works fine,
but how does this function work with PCP authentication?  E.g.
in Figure 1, is the left-most client authenticating to the
middle or rightmost server? I think I could imagine either
answer being desirable and don't see a way that both could be
supported.