ln_normalope: fix to save channels
ln_normalope: fix to save channels

after clear irrevocably committed updates
and save secrets after receiving `revoke_and_ack`

nayutaco/ptarmigan,nayutaco/ptarmigan,nayutaco/ptarmigan,nayutaco/ptarmigan,nayutaco/ptarmigan,nayutaco/ptarmigan,nayutaco/ptarmigan