[ic] RPC traffic settings

[Grant]

>>> $SIG{CHLD} = 'IGNORE';
>>
>> I think you fixed it (with only a tiny amount of info from me).
>> Should this be added to bin/interchange in git?
>
> I spoke too soon although it does seem to have helped.  With
> PreForkSingleFork and without the above line my system couldn't make
> it past 15 minutes without becoming unresponsive, but after adding it
> the system has gone 40 minutes with ChildLife and 60 minutes without
> ChildLife.  I tried to monitor zombies with the following but didn't
> see any whenever I checked:
>
> # ps aux | awk '{ print $8 " " $2 }' | grep -w Z
>
> Is $SIG{CHLD} = 'IGNORE'; beneficial without PreForkSingleFork?  Maybe
> it's redundant?
>
> - Grant

Unfortunately the IGNORE line seems to prevent IC from sending mail on
my system via postfix:

"Unable to send mail using /usr/sbin/sendmail"

Removing it fixes the problem.

- Grant