Revert "mbuf: do not restore dying interfaces"
This reverts commit 703e533da5e2e4743d38bbf4605fec041bc69976.
Revert "ifnet/mbuf: provide KPI to serialize/restore m->m_pkthdr.rcvif"
This reverts commit e1882428dcbbafd2814d7e17b977a8f686784b39.
Obtained from: github.com/glebius/FreeBSD/commits/backout-ifindex