Log Message:
Update to 2.2.0 (2007). Changes:

    - Fix handling of MS-DOS reserved names.  Besides handling names like
      "con", we also need to handle "con.foo.txt".
    - Auto-detect and handle "bad Mac" archives.
    - Added "kNuValIgnoreLZW2Len" flag, which enables NuLib2 to handle
      archives created by an unknown but badly broken program.

    - Switched from GPL to BSD license.