1.3.1 Enhancements * Add some missing translations * Add Serbian language Fixes * Fix broken redirect for empty `serverURL` * Fix wrong variable type for HSTS maxAge * Fix GitLab snippets showing up without being configured * Fix Google's API after disabling Google+ * Fix broken PDF export Contributors * atachibana (translator) * [Aurélien JANVIER](https://github.com/ajanvier) (translator) * [Daan Sprenkels](https://github.com/dsprenkels) (translator) * Farizrizaldy (translator) * [Luclu7](https://github.com/Luclu7) * Sylke Vicious (translator) * [toshi0123](https://github.com/toshi0123) & okochi-toshiki * [Turakar](https://github.com/Turakar) * [Vladan](https://github.com/cvladan) (translator)