Log Message:
Update to 0.22:

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Version 0.22
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 desktop-file-validate
  - add DBusActivatable key to allowed keys (Matthias Clasen)
  - warn about OnlyShowIn in Action groups (Matthias Clasen)
  - allow validating multiple desktop files (Matthias Clasen)
  - improve help output (Matthias Clasen)
  - update man page (Matthias Clasen)

 update-desktop-database
  - list only once a desktop file per mime type (Vincent)

 misc
  - honor NOCONFIGURE=1 (Colin Walters)