Bug#872470: Fixed busy-wait loop

[Jeremy Sowden]

The package includes a patch to fix seg-faults which can occur by
sending repeated SIGINTs or SIGTERMs.  However, it does this by
introducing a busy-wait loop which wakes the process up ten times a
second.

I've attached an updated version of it which uses a blocking select(2)
instead.

J.
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