prevent FC with old LND nodes if HTLCs are in flight while closing

[DerEwige]

This simple change will prevent an FC when a close is done while HTLCs are in flight with LND nodes older than 0.18.0

[t-bast]

It's very sad to implement those hacky workarounds, but if it avoids force-closed channels, it's worth it! And hopefully we can get rid of those at some point 🤞

[DerEwige]

check timed out on the 3rd to last check...
How do I rerun the check without commiting again?

[t-bast]

check timed out on the 3rd to last check...
How do I rerun the check without commiting again?

Unfortunately this happens sometimes when the CI machine doesn't have enough memory available and a bitcoind instance fails to start (since our tests spin up a bunch of bitcoind instances in parallel). When that happens, I'll restart the failed build manually from github, don't worry about it.

[t-bast]

Thanks!