Changed in 2.22.1:
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* Don't launch external programs under GDM (#525447)
  - Distributors please note this is a security issue
* Updated translations:
  ru      (Yuriy Penkin)
  cs      (Petr Kovar)
  nn      (Eskild Hustvedt)
  et      (Ivar Smolin)
  ca      (David Planella)
  hu      (Gabor Kelemen)
  el      (Giannis Katsampiris)