illumos gate

Very low priority thing, but perhaps as someone is already working on sd, this could be touched at same time.

https://github.com/illumos/illumos-gate/blob/master/usr/src/uts/common/io/scsi/targets/sd.c#L15007

The trace line uses `sd_start_cmd` as prefix, which is the name of the routine, but it is missing letter (s) at the end, as in sd_start_cmds, instead of sd_start_cmd.

                SD_TRACE(SD_LOG_IO_CORE, un,
                    "sd_start_cmd: SD_PKT_ALLOC_SUCCESS 0x%p\\n",
                    pktp);