fix #6200: if we cannot parse an onion, send a failure code that has the BADONION bit
fix #6200: if we cannot parse an onion, send a failure code that has the BADONION bit

wakiyamap/electrum-mona,pooler/electrum-ltc,wakiyamap/electrum-mona,pooler/electrum-ltc,spesmilo/electrum,wakiyamap/electrum-mona,wakiyamap/electrum-mona,spesmilo/electrum,pooler/electrum-ltc,pooler/electrum-ltc,spesmilo/electrum,spesmilo/electrum