Reenabled "SCIOCOMAND" ioctl. Restructured so low level drivers can easily request retries. Added preliminary fixed SCSI devices (should be revisited before 2.1) Added "ssc" device that can have its' (HBA, ID, LUN) set via ioctl.
minor cleanup. Added $Id$ to files that did not have any version info, etc
problems with respect to multiple tar files on one tape. Now uses malloc of data structures to reduce static kernel size.