[BF] explicitly kill sflowtool on exit
[IM] default to using rrdcached, as anything else in insane
[IM] removed Net::IP
[IM] renamed sflow-to-rrd.pl as sflow-to-rrd-handler
[BF] ensure that sflow is killed promptly after signal
[IM] added control-sflow-to-rrd-handler startup script
Merge branch 'im-sflowdaemonize'