New issue 17: Full connectivity

Hi,

Based on talks at San Diego, I've created a new issue
on the issue tracker:

   "If both parties have several addresses, do we assume 
  that all pairs have connectivity between them?"

There was discussion about this in mid-April (one example 
mentioned was two SGWs connected via two different private 
networks), and most people thought we should not assume this.

Assuming this would also seem to largely rule out IPv4/v6
mobility.

If we decide _not_ to make this assumption, then we have cases 
where we have to change both parties's addresses in SAs 
at the same time.

It also seems the protocol will require some kind of address
lists, so something like SMOBIKE won't work (unless we assume 
one party knows several addresses for the other party via some 
other means than address lists sent within the protocol).

Any comments?

Best regards,
Pasi