4.9.1

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- Fix return value of CanSuspend and CanHibernate.
- Make common no-reply error more subtile.
- Bump package dependency versions.
- Remove deprecated or unused code from xinit.
- Use macro to search for sed.
- Fallback to old method for shutdown (bug #8630).
- Improve xflock4 script (bug #3770).
- Drop the sync code because it can segfault on ext2 (bug #7887).
- Always escape name and comment in dialog.
- Translation updates: Catalan (Valencian), Danish, German, Greek,
  Basque, Finnish, French, Galician, Croatian, Italian, Japanese,
  Kazakh, Korean, Lithuanian, Dutch (Flemish), Norwegian Nynorsk,
  Polish, Portuguese, Portuguese (Brazilian), Slovak, Turkish,
  Ukrainian, Chinese (China).