Tidy up comments.
Tidy up comments.

Add definitions for VINUM_BLOCK_PLEX and VINUM_CHAR_PLEX.

struct plex: add lock-related variables.

struct rangelock: add variables.

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