remove all files on user removal

src/freedombone-app-ghost

     read_config_param "GHOST_DOMAIN_NAME"
     nginx_dissite $GHOST_DOMAIN_NAME
     remove_certs ${GHOST_DOMAIN_NAME}
-    deluser -r ghost
+    deluser --remove-all-files ghost
     if [ -f /etc/nginx/sites-available/$GHOST_DOMAIN_NAME ]; then
         rm -f /etc/nginx/sites-available/$GHOST_DOMAIN_NAME
     fi

src/freedombone-app-jitsi

     if [ -d /etc/jitsi ]; then
         rm -rf /etc/jitsi
     fi
-    deluser -r jitsi
+    deluser --remove-all-files jitsi
     if [ -d /usr/share/jitsi-videobridge ]; then
         rm -rf /usr/share/jitsi-videobridge
     fi