xfs_scrub: explicitly track corruptions, not just errors
Rename the @errors_found variable to @corruptions_found to make it
more explicit that we're tracking fs corruption issues. Add a new
str_corrupt() function to handle communications that fall under this new
corruption classification. str_error() now exists to log runtime errors
that do not have an associated errno code.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Eric Sandeen <sandeen@sandeen.net>