Move ${VPATH} explanation under the .PATH rule section.
Move ${VPATH} explanation under the .PATH rule section.

Clarify my vague explanation of how ${VPATH} works and why it shouldn't
be used.

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