Add SPT passthrough (MS interface in NT and later) to broaden SCSI

support. New device names are "pd<n>", "sd<l>" and "tape<n>".


git-svn-id: https://smartmontools.svn.sourceforge.net/svnroot/smartmontools/trunk@2289 4ea69e1a-61f1-4043-bf83-b5c94c648137