IPv6 link local address generation for P2P interfaces

[Martin Husemann <martin%duskware.de@localhost>]

Maybe a naive question: the magic that generates link local addresses for
IPv6 interfaces does not seem to care about POINTOPOINT interfaces,
so it creates strange setups like this:

  inet6 fe80::a00:20ff:fe99:fc91%pppoe1 ->  prefixlen 64 scopeid 0xb
or
  inet6 fe80::a00:20ff:fe99:fc91%gre0 ->  prefixlen 64 scopeid 0x9

Should it check IFF_POINTOPOINT, generate a destination address too and
adjust prefixlen?

I'm trying to understand the setup of pppoe(4) for IPv6. The ipcp6 negotiation
uses the first link local address, including it's destination address if not
unspecified as initial suggestion for the negotiation, which does not make
a lot sense to me in the default setup.

Martin