Adding SCSI Passthrough to CTL

[suraj ponugoti]

 Hi,

This project is about exporting physical SCSI devices over iSCSI through CTL as an actual SCSI target.

Wiki Page: https://wiki.freebsd.org/SurajPonugoti
Git Repo: https://github.com/suraj5/freebsd

Weekly updates:
1)Created lun for each corresponding SCSI device.
2)Inquiry status command working,but I need to copy status from ccb to ctl_io ccb.

Thanks
Suraj