Enable ghost privacy option

It's a pity this isn't the default

src/freedombone-app-ghost

     echo "            host: '127.0.0.1'," >> $ghost_config
     echo "            port: '${GHOST_PORT}'" >> $ghost_config
     echo '        },' >> $ghost_config
+    echo '        privacy: {' >> $ghost_config
+    echo '            useTinfoil: true,' >> $ghost_config
+    echo '        },' >> $ghost_config
     echo '        logging: false' >> $ghost_config
     echo '    }' >> $ghost_config
     echo '};' >> $ghost_config