  NOTE: it is necessary to clear m_pkthdr on mbuf allocation.   there are drivers that does NOT use MGETHDR to allocate packet   header mbuf.  these drivers may need fixes.
  NOTE: it is necessary to clear m_pkthdr on mbuf allocation.
  there are drivers that does NOT use MGETHDR to allocate packet
  header mbuf.  these drivers may need fixes.

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