Handle linuxdoc docs with a declaration like:
Handle linuxdoc docs with a declaration like:

  <!doctype linuxdoc system>

which is the standard practice used for the linux HOWTO documents.

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