Add zeronet user

src/freedombone

@@ -1605,7 +1605,7 @@ function install_zeronet {
   apt-get -y install python python-msgpack python-gevent python-pip
   pip install msgpack-python --upgrade
 
-  useradd --home /opt/zeronet/ --shell /sbin/nologin --user-group daemon zeronet
+  useradd -d /opt/zeronet/ -s /bin/false zeronet
   git clone $ZERONET_REPO /opt/zeronet
   sudo chown -R zeronet:zeronet /opt/zeronet