When stopping the broker using "qpidd -q" the qpidd executable
is waiting only for 10 seconds. In some situation, 10 seconds
do not seem to be enough to shutdown the broker and the "qpidd -q"
ends in error. Especially in situtions when the broker shutdown is
done by a script, this leads to unnecessary complications, because
the situation need to be evaluated and handled.
The --wait interval already used during broker startup should be used
to allow extending the 10 second interval. Having a configurable wait
interval can help especially in situations when the user knows that
the broker shutdown might take a longer time due to its configuration
(amount of queues, number of messages, ...).