Log Message:
Update to 7.1:

Sense codes are now transcribed into human-readable representation.
The -F/-free-space option was added. Solaris compatibility was
increased. Building on Mac OS X 10.5 was fixed.  A workaround for
missing direct I/O on Linux 2.4 was implemented.  SCSI devices are
now locked more aggressively on Linux. Error handling was improved.
Several other fixes and enhancements were made.