- Flag sym(4) as supporting unmapped I/O; all necessary conversion actually   already has been done as part of r246713. - Revert a part of r251402 in order to appease clang.
- Flag sym(4) as supporting unmapped I/O; all necessary conversion actually
  already has been done as part of r246713.
- Revert a part of r251402 in order to appease clang.

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