lnchannel: rename force_close_detected -> closing_detected, use it only if state is OPEN
lnchannel: rename force_close_detected -> closing_detected, use it only if state is OPEN

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