Minor cleanups tp devfs_readdir(); Add devfs_read() for directories.  (inspired by bp@)
Minor cleanups tp devfs_readdir();
Add devfs_read() for directories.  (inspired by bp@)

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