Serial: Avoid using CS5 and CS6 if identical to CS7 (as on Haiku).
Serial: Avoid using CS5 and CS6 if identical to CS7 (as on Haiku).

brltty/brltty,brltty/brltty,brltty/brltty,brltty/brltty,brltty/brltty,brltty/brltty