MFC r265323 (by trasz): Provide better descriptions for 'struct ctl_scsiio' fields; based mostly on emails from ken@.
MFC r265323 (by trasz):
Provide better descriptions for 'struct ctl_scsiio' fields; based mostly
on emails from ken@.

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