Add nbd.1.0.2

Signed-off-by: David Scott <dave.scott@citrix.com>
Improve nbd descr

Signed-off-by: David Scott <dave.scott@citrix.com>
nbd depends on cmdliner

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #2678 from djs55/nbd.1.0.2

Add nbd.1.0.2