NBD

NBD is used at run time in 3 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps)			NBD version
		bsync		^0.2.3
		nbdserve		^0.2.2
		fusenbd		^0.2.1
210	1	rockusb	dev	^0.2.3