- updated to 2.8.4

- updated to 2.8.4
- updated info patch, removed obsolete DESTDIR and immunix-owl-tmp patches
- added pl.po-update patch (few updated entries, many typos)
- removed outdated external man pages (up to date man pages containing only
  command line options descriptions are included in package)
- fixed typos in pl description

Changed files:
    diffutils-DESTDIR.patch -> 1.3
    diffutils-immunix-owl-tmp.patch -> 1.2
    diffutils-info.patch -> 1.3
    diffutils-pl.po-update.patch -> 1.1
    diffutils.spec -> 1.41