Bump 3.17.92 release

The GNOME To Do development team proudly announces the
availability of 3.17.92 release.

News for this version:

Translations:
        * Catalan (Jordi Mas)
        * Finnish (Jiri Grönroos)
        * French (Alexandre Franke)
        * Galician (Fran Dieguez)
        * German (Christian Kirbach)
        * Greek (Tom Tryfonidis)
        * Hungarian (Balázs Úr)
        * Kazakh (Baurzhan Muftakhidinov)
        * Korean (Seong-ho Cho)
        * Lithianian (Aurimas Černius)
        * Norwegian bokmål (Kjartan Maraas)
        * Polish (Piotr Drąg)
        * Portuguese (Pedro Albuquerque)
        * Slovak (Dušan Kazik)
        * Spanish (Daniel Mustieles)
        * Turkish (Muhammet Kara)
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