Merge pull request #1644 from wpaulino/kw-fees

multi: switch to sat/kw fees

mock.go

@@ -226,7 +226,7 @@ func (*mockWalletController) GetPrivKey(a btcutil.Address) (*btcec.PrivateKey, e
 }
 
 func (*mockWalletController) SendOutputs(outputs []*wire.TxOut,
-	_ lnwallet.SatPerVByte) (*chainhash.Hash, error) {
+	_ lnwallet.SatPerKWeight) (*chainhash.Hash, error) {
 
 	return nil, nil
 }