Re: issue 5: zero address set

I don't believe zero address set support is so useful but I have
a little concern about it: when a node has really no available
addresses I prefer its peer knows this in place of just
keep the last usable address and suggest it does still work...
Of course, this situation should be temporary.

Regards

[email protected]

PS: to come back to mobility, when a mobile goes from a physical interface
to another one, in the middle it has two or zero interfaces, and both cases
have "interesting" consequences (here we can see zero cases').