Implement DIOCGDINFO for volumes.  newfs will no longer build a file system on a volume without a disk label.
Implement DIOCGDINFO for volumes.  newfs will no longer build a file
system on a volume without a disk label.

Approved by: re (rwatson)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase