[Bug 197608] timeout(1) does not handle zombie grandchildren

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197608

--- Comment #2 from Baptiste Daroussin <bapt at FreeBSD.org> ---
Created attachment 152960
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=152960&action=edit
Check the monitoring pid on sigchld

This patch checks for the monitored pid when receiving a SIGCHILD not from the
moniror pid and only 1 process is left under control of timeout(1)

Seems to fix the issue for me, can you confirm?

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