[PATCH v3] manual: Document the System V sigpause function

[Andreas Schwab]

On Mai 16 2020, Florian Weimer via Libc-alpha wrote:

> +The @code{sigpause} function in @theglibc{} is the @w{System V}
> +variant.  The BSD variant is no longer provided by @theglibc{}.
> +(The difference is that the BSD variant has a bitmask argument,
> +while the @w{System V} expects a single signal number.)

+variant

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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