- In nd6_rtrequest(), ignored a route when it is created by cloning and is not a neighbor.  see comments for the detailed reason.
- In nd6_rtrequest(), ignored a route when it is created by cloning and
is not a neighbor.  see comments for the detailed reason.

- Rejected the process of nd6_rtrequest() when the request is RESOLVE and
the interface does not need neighbor caches.

Obtained from:	KAME
MFC After:	1 week

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase