K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2017-12-12T01:20:45.999599Z
K 7
svn:log
V 276
MFC r326597: vnic: apply hardware L3 checksum only for IPv4

Previously we set the csum_l3 flag for IPv4 and IPv6, but only IPv4
should have header checksumming applied.

Prompted by Linux commit fa6d7cb5d76cf0467c61420fc9238045aedfd379.

Sponsored by:	The FreeBSD Foundation

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