Used to provide CalDAV/CardDAV services.
An easy workaround to change round photos to square ones would be to use the new theming_customcss https://apps.nextcloud.com/apps/theming_customcss app with the following oneliner:
.contact__icon, .contactdetails__logo, .contactdetails__header avatar { border-radius: 0 !important; }
Posted on github:
https://github.com/nextcloud/contacts/issues/312#issuecomment-326134246
— Martin Burnicki martin.burnicki@burnicki.net 2017-09-01 09:34