snabb config listen: fix bug introduced in bfa68ba1bd4ccf7afe973ed21cafac9a0dcb72b5
snabb config listen: fix bug introduced in bfa68ba1bd4ccf7afe973ed21cafac9a0dcb72b5

eugeneia/snabb,snabbco/snabb,eugeneia/snabb,eugeneia/snabb,snabbco/snabb,snabbco/snabb,eugeneia/snabb,snabbco/snabb,snabbco/snabb,eugeneia/snabb,snabbco/snabb,snabbco/snabb,eugeneia/snabb,snabbco/snabb,eugeneia/snabb,eugeneia/snabb