Log payment hash of the HTLC that causes a force closure

When LDK force closes a channel because of an HTLC time out, we would like to
know the payment hash of the HTLC so we can debug the reason for time out.

Author: yellowred

lightning/src/chain/channelmonitor.rs

@@ -5508,7 +5508,7 @@ impl<Signer: EcdsaChannelSigner> ChannelMonitorImpl<Signer> {
 					let htlc_outbound = $holder_tx == htlc.offered;
 					if ( htlc_outbound && htlc.cltv_expiry + LATENCY_GRACE_PERIOD_BLOCKS <= height) ||
 					   (!htlc_outbound && htlc.cltv_expiry <= height + CLTV_CLAIM_BUFFER && self.payment_preimages.contains_key(&htlc.payment_hash)) {
-						log_info!(logger, "Force-closing channel due to {} HTLC timeout, HTLC expiry is {}", if htlc_outbound { "outbound" } else { "inbound "}, htlc.cltv_expiry);
+						log_info!(logger, "Force-closing channel due to {} HTLC timeout, HTLC expiry is {}, HTLC payment_hash is {}", if htlc_outbound { "outbound" } else { "inbound "}, htlc.cltv_expiry, htlc.payment_hash);
 						return true;
 					}
 				}