lnwallet: add anchor commitmenttype

With this commitment type, we'll add extra anchor outputs to the
commitment transaction if the anchor channel type is active.

contractcourt/chain_watcher.go

@@ -351,9 +351,8 @@ func isOurCommitment(localChanCfg, remoteChanCfg channeldb.ChannelConfig,
 
 	// With the keys derived, we'll construct the remote script that'll be
 	// present if they have a non-dust balance on the commitment.
-	remoteDelay := uint32(remoteChanCfg.CsvDelay)
-	remoteScript, err := lnwallet.CommitScriptToRemote(
-		chanType, remoteDelay, commitKeyRing.ToRemoteKey,
+	remoteScript, _, err := lnwallet.CommitScriptToRemote(
+		chanType, commitKeyRing.ToRemoteKey,
 	)
 	if err != nil {
 		return false, err