Deliver siginfo when signal is generated by thr_kill(2) (SI_USER with properly filled si_uid and si_pid).
Deliver siginfo when signal is generated by thr_kill(2) (SI_USER with properly
filled si_uid and si_pid).

Reported by:	Joel Bertrand <joel.bertrand systella fr>
PR:		141956
Reviewed by:	kib
MFC after:	2 weeks

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