use correct result from tar
use correct exit code from tar
add comment
add awk script for filtering possibly corrupt files from tar output
filter tar verify output for possibly corrupted files
have different exit states for possibly corrupt and changed files
print full lines
take only specific messages into account
implement different exit status in backup script
improve message
add number of changed/corrupt files to E-mail report
messages are not used
also pass error messages to filter script
regard tar error messages as a changed file
don't check for changed files if it is a tar error message
display number of changed files also if possibly corrupt files are detected
log timestamp when loading next tape
Merge branch 'dev' into tape-robot

Conflicts:
	backup_main.sh