Log Message:
fdupes: update to 2.2.1.

Changes from 2.2.0 to 2.2.1:

 - Fix bug in code meant to skip over the current log file when --log
   option is given.
 - Updates to copyright notices in source code.

Changes from 2.1.2 to 2.2.0:

 - Add --deferconfirmation option.
 - Check that files marked as duplicates haven't changed during program
   execution before deleting them.
 - Update documentation to indicate units for SIZE in command-line options.
 - Move some configuration settings to configure.ac file.