mkfs.xfs.8: warn about the version=ci feature

Document the exact byte transformations that happen during directory
name lookup when the version=ci feature is enabled.  Warn that this is
not generally compatible, and that people should not use this feature.

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