* kame/rtsold: check for invalid RAs, like non-zero icmp6 code or   non-linklocal source address.  Found by TAHI team.
* kame/rtsold: check for invalid RAs, like non-zero icmp6 code or
  non-linklocal source address.  Found by TAHI team.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame