nbd-client -d does not support nbdtab shortname

[mxork]

With nbd0 configured in /etc/nbdtab:

$ nbd-client nbd0
Negotiation: ..size = 32768MB
Connected /dev/nbd0

But...

nbd-client -d nbd0
Error: Invalid nbd device target

Exiting.

Version:

$ nbd-client --version
This is nbd-client, from nbd 3.18

[yoe]

It does work with the full device name, but yeah, that seems like an obvious oversight.