List processes that take long to terminate at shutdown

Report hanging processes every 30 seconds to be able to pinpoint shutdown problems.

sudo gedit /etc/init.d/sendsigs

...

while [ -n "$(upstart_killed_jobs)" ] ; do
	seq=$(($seq+1))
	if [ $seq -ge 300 ] ; then
		break
	fi

	
	#wjv 20130210 report hanging processes every 30 seconds
	if [ $(( $seq % 30 )) -eq 0 ] ; then
		echo "Waiting for:"
		initctl list | grep 'stop/killed' | nl
		sleep 4
	fi

	
	sleep 1
done

...