[Exim] SIGCHLD complaints back in exim 4.20

Philip,

The old behaviour of exim (pre 4.14) on new linux kernels, where reports
of the form:-
        May 23 04:37:38 pillarbox kernel: application bug: exim(1877) has SIGCHLD set to SIG_IGN but calls wait().
        May 23 04:37:38 pillarbox kernel: (see the NOTES section of 'man 2 wait'). Workaround activated.

are seen on all deliveries, appears to be reoccurring in 4.20 - looks
like the fix got backed out or worked round.

[The particular config where this is seen has piped delivery and a
transport_filter]

I'll have a look myself later today.

    Nigel.
--
[ Nigel Metheringham           Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]