Added used include of <sys/sx.h>.  Don't depend on namespace pollution in <sys/file.h> or <sys/socketvar.h>.
Added used include of <sys/sx.h>.  Don't depend on namespace pollution in
<sys/file.h> or <sys/socketvar.h>.

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