New port: sysutils/dsbmc-cli

dsbmc-cli is a command-line client for DSBMD that provides a simple interface
to query information about storage devices, and to send requests to mount,
unmount and eject these. Furthermore, it can be used as automounter and
autounmounter.

WWW: http://freeshell.de/~mk/projects/dsbmc-cli.html

PR: 220197
Submitted by: Marcel Kaiser <mk@nic-nac-project.org>
Approved by: garga (mentor)
Differential Revision: https://reviews.freebsd.org/D11297