xfs_scrub: enable users to bump information messages to warnings

Add a -o iwarn option that enables users to specify that informational
messages (such as incomplete scans, or confusing names) should be
treated as warnings.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
4 files changed