Support 64-bit bandwidths #541

Job	Run time
build (gcc, vanilla)	7m 26s
build (gcc, dpdk)	7m 25s
build (gcc, dpdk-light)	7m 24s
build (gcc, netmap)	7m 25s
build (gcc, vanilla-nopool)	7m 7s
build (gcc, dpdk-flow-dynamic)	7m 26s
build (clang, vanilla)	7m 26s
build (clang, dpdk)	7m 28s
build (clang, dpdk-light)	7m 25s
build (clang, netmap)	7m 26s
build (clang, vanilla-nopool)	7m 25s
build (clang, dpdk-flow-dynamic)	7m 29s
	1h 28m 52s

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