16257 bnu: parameters default to int
Reviewed by: Dan Cross <cross@oxidecomputer.com>
Reviewed by: Bill Sommerfeld <sommerfeld@hamachi.org>
Approved by: Robert Mustacchi <rm@fingolfin.org>

11291 bnu: NULL pointer errors
Reviewed by: Andrew Stormont <andyjstormont@gmail.com>
Approved by: Garrett D'Amore <garrett@damore.org>

6268925 cmd/bnu and gcc don't get along

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