MFC the change from 1.27, removal of zones from the empty zone list that may theoretically be allocated some day.
MFC the change from 1.27, removal of zones from the empty zone list that
may theoretically be allocated some day.

Approved by:	re (kensmith)

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