[PATCH v2 1/8] nptl: Move Linux pthread_kill to nptl

[Florian Weimer]

* Adhemerval Zanella:

> The nptl already expects a Linux syscall internally.  Also
> __is_internal_signal is used and the DEBUGGING_P check is removed.
>
> Checked on x86_64-linux-gnu.

Looks okay to me.

Thanks,
Florian
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