Make xpt_rescan() more correct, as it was before r197208: do not use XPT_SCAN_LUN for wildcard LUN, fall back to XPT_SCAN_BUS.
Make xpt_rescan() more correct, as it was before r197208: do not use
XPT_SCAN_LUN for wildcard LUN, fall back to XPT_SCAN_BUS.

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