if ! getent passwd citadel >/dev/null; then
adduser --system --ingroup citadel --home /var/lib/citadel \
--gecos "Citadel system user" --shell /bin/sh \
- --disabled-password citadel
+ --disabled-password --no-create-home citadel --shell /bin/false
fi
chown -R citadel:citadel /etc/citadel