3.22.1:
* Port from intltool to gettext (this drops the intltool dependency)
* Add various build-time checks (this adds an optional build-time dependency on xmllint)
* Translations:
** cs (Marek Černocký)
** da (scootergrisen)
** de (Mario Blättermann)
** es (Daniel Mustieles)
** fi (Jiri Grönroos)
** fr (Alexandre Franke)
** fur (Fabio Tomat)
** hu (Balázs Meskó)
** id (Kukuh Syafaat)
** it (Gianvito Cavasoli)
** lt (Aurimas ÄŒernius)
** pl (Piotr DrÄ…g)
** pt (Tiago Santos)
** pt_BR (Rafael Fontenelle)
** sk (Dušan Kazik)
** sv (Anders Jonsson)
** zh_CN (liushuyu, Mandy Wang)