Compare list of strings/directory listings

/var/www/virtual/0x80.pl/www/html/shell/cmplists.py [diff|minus|or|sum|xor|and|common] list1|dir1 list2|dir2

where:
* list is a file that contains list of strings (usually paths)
* dir - directory to scan
* action is:
  - diff or minus [default] - list string from set 1 that not exist in set 2
  - or or sum               - sum of all strings (duplicates removed)
  - and or common           - string that exist in 1 and 2
  - xor                     - set 1 minus 2 or 2 minus 1