K 10
svn:author
V 11
arichardson
K 8
svn:date
V 27
2020-05-11T08:40:33.486812Z
K 7
svn:log
V 308
Avoid using non-portable dd conv=osync option

The same thing can be achieved using the bs=$SIZE and conv=sync options.
Unlike conv=osync, conv=sync is support on both Linux and macOS.

Reviewed By:	imp, jhb (earlier version)
Obtained from:	CheriBSD
Differential Revision: https://reviews.freebsd.org/D24788

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