fix duplicated archived files
The problem was that even though the already archived files
were skipped in the summarizing the total size the actual
list of files was created only by the number of previously
counted files.

integrate several steps in one loop
Fix answer creation
Fix manifest creation
Fix traps - script now actually exits
Use ls listings in natural order instead of age sorted to dramatically speed up the script.
Fix traps - traps now always include previous traps
traps now include a log message
put traps in functions
fix handler name in trap
add file size approximation
put pnfsid filter regex in global constant
fix manifest output