MFC 1.12: don't accept invalid form of an address like 1:2:3:4:5:6:7::8.
MFC 1.12: don't accept invalid form of an address like 1:2:3:4:5:6:7::8.

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