Setting parity for remote serial

[Joel Brobecker]

> Glad to hear that this patch is still needed.
> I believe, all questions with FSF copyright assignments had been resolved?
> Please, let me know what I should do to complete this contribution.

Indeed! Thanks very much for doing that.

If you could rebase the patch against master, and resubmit,
I promise to review it promptly (I will taking a week off
Mar 07-15, though). If you'd rather I took it over, I will
try to do so after I come back.

Thanks again!
-- 
Joel