Partially revert r1.12, in which a warnx() if the device is not a character device is changed to an errx().  This unnecessarily compromises device independence.
Partially revert r1.12, in which a warnx() if the device is not a
character device is changed to an errx().  This unnecessarily
compromises device independence.

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