Add IP_RECVIF to BSD and IP_RECVDSTADDR to apple. #1184
Merged
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FreeBSD/OpenBSD do not support IP_PKTINFO for IPv4 but use IP_RECVIF for interface index and IP_RECVDSTADDR for destination address.
NetBSD and macOS also support IP_RECVIF and IP_RECVDSTADDR in addition to IP_PKTINFO.
(For IPv6, all use IPV6_PKTINFO)