f comment about reorg-closure

Author: TheBlueMatt

lightning/src/ln/channel.rs

@@ -3666,6 +3666,10 @@ impl<Signer: Sign> Channel<Signer> {
 				funding_tx_confirmations = 0;
 			}
 
+			// If we've sent funding_locked (or have both sent and received funding_locked), and
+			// the funding transaction's confirmation count has dipped below minimum_depth / 2,
+			// close the channel and hope we can get the latest state on chain (because presumably
+			// the funding transaction is at least still in the mempool of most nodes).
 			if funding_tx_confirmations < self.minimum_depth as i64 / 2 {
 				return Err(msgs::ErrorMessage {
 					channel_id: self.channel_id(),