nnrpd given the same PID as innfeed

[Richard Kettlewell]

On 15/06/15 23:04, Richard Kettlewell wrote:
> The issue described in 2 needs to be fixed.  My usual approach in this
> situation is to block signals except when waiting in select().  (The
> signal mask must also be restored inside forks if this approach is
> used.)  I'll submit a patch at some point, subject of course to any
> discussion here.

Patch attached.  I've lightly tested it, including inspecting strace
output while manually poking the system to check it's not gone
completely off the rails.

ttfn/rjk

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