[BRLTTY] brltty manual page add -o option

[Dave Mielke]

[quoted lines by Jaroslav Skarvada on 2020/05/19 at 10:41 -0400]

>we did man page scan in Fedora and found that the -o option
>is missing from the brltty manual page. The attached patch
>adds it, but it may need better description

Thanks.

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