K 10
svn:author
V 2
kp
K 8
svn:date
V 27
2021-01-05T20:04:09.033835Z
K 7
svn:log
V 530
pf: Fix unaligned checksum updates

The algorithm we use to update checksums only works correctly if the
updated data is aligned on 16-bit boundaries (relative to the start of
the packet).

Import the OpenBSD fix for this issue.

PR:		240416
Obtained from:	OpenBSD
MFC after:	1 week
Reviewed by:	tuexen (previous version)
Differential Revision:	https://reviews.freebsd.org/D27696

(cherry picked from commit c3f69af03ae7acc167cc1151f0c1ecc5e014ce4e)

Git Hash:   21745738a2b5662dfbe730b6338aa38e829cb0eb
Git Author: kp@FreeBSD.org
END