- use m_pkthdr.rcvif instead of (possibly) embedded link ID to be more   generic on scopes. - clear embedded scope ID under !SCOPEDROUTING cases only.
- use m_pkthdr.rcvif instead of (possibly) embedded link ID to be more
  generic on scopes.
- clear embedded scope ID under !SCOPEDROUTING cases only.

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