sdn_sensor.json: enable both CPU cores for packet processing
stack: NUMA mbuf_pools, RSS packet RX, add ip check function
extractor.c: fix unitialized memory bug in dns decoding
metadata.c: json_object strings are internal, memory corruption bug
sdn_sensor.c: NUMA-aware, RSS packet RX, multi-TX and multi-RX queues
sdn_sensor.h: NUMA-aware, remove unneeded structs
conf: remove unneeded dpdk queue_count option