Add zhack command missing from vendor import illumos-gate revision 13742:b6bbdd77139c
Add zhack command missing from vendor import
illumos-gate revision 13742:b6bbdd77139c

Obtained from:	ssh://anonhg@hg.illumos.org/illumos-gate

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