restoring trunk from 1.7 release
Updates for Dave Fox (AIX)
Fix bugs with 32 bit truncation of device sizes.
Fix problems with aix getsize code.
Add bsi patterns.
ready for 1.8 release
cleanup
scrub signature
access error before progress bar
Signature should write multiples of blocksize for aix
minor tweaks to error reporting, spec file, etc.
rework some error reporting
rel notes
added -S option
prep for 1.8 release
README was renamed to NEWS.
compile on os/x
fix typo in getsize main
cleanup + portability tweaks
refuse to scrub a zero length file
hpux getsize
add -r option to unlink file after scrub
change default blocksize to 1MB, cleanup
handle >2tb device in linux