Read default domain

src/freedombone-app-scuttlebot

                       SYSTEM_TYPE)
 
 function scuttlebot_create_invite {
+    read_config_param ${GNUSOCIAL_DOMAIN_NAME}
     SCUTTLEBOT_ONION_HOSTNAME=$(cat /var/lib/tor/hidden_service_scuttlebot/hostname)
     invite_string=$(su -c "sbot invite.create 1" - scuttlebot | sed 's/"//g' | sed "s/$DEFAULT_DOMAIN_NAME/$SCUTTLEBOT_ONION_HOSTNAME/g")