This mostly matches the default configuration, but notably does not
make the lastName field mandatory, in order to accommodate mononymy.
Change-Id: I47ca86a179eb9b7dcf5f3e761681c78e22f5265c
Fixes: https://git.snix.dev/snix/snix/issues/104
Reviewed-on: https://cl.snix.dev/c/snix/+/30289
Reviewed-by: Florian Klink <flokli@flokli.de>
Tested-by: besadii
