[docs] [issue8519] doc: termios and ioctl reference links

[Berker Peksag]

Berker Peksag added the comment:

+1 for using the manpage directives.

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keywords: +easy
nosy: +berker.peksag
stage:  -> needs patch
type:  -> enhancement
versions: +Python 3.5, Python 3.6

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