add litecoin regtest configuration to lnd

regtest change to chainregistry for default port number

merge w/ master

lnd.go

@@ -123,7 +123,7 @@ func Main() error {
 	case cfg.Bitcoin.SimNet || cfg.Litecoin.SimNet:
 		network = "simnet"
 
-	case cfg.Bitcoin.RegTest:
+	case cfg.Bitcoin.RegTest || cfg.Litecoin.RegTest:
 		network = "regtest"
 	}