Fixed `make depend'.  The previous change reduced it to making only config.h (which isn't used directly).  Added a comment about the indirect use of config.h.
Fixed `make depend'.  The previous change reduced it to making only
config.h (which isn't used directly).  Added a comment about the
indirect use of config.h.

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