multi: update btcsuite API's to latest upstream changes

This commit makes a large number of minor changes concerning API usage
within the deamon to match the latest version on the upstream btcsuite
libraries.

The major changes are the switch from wire.ShaHash to chainhash.Hash,
and that wire.NewMsgTx() now takes a paramter indicating the version of
the transaction to be created.

lnwire/channel_announcement.go

@@ -7,7 +7,7 @@ import (
 
 	"github.com/go-errors/errors"
 	"github.com/roasbeef/btcd/btcec"
-	"github.com/roasbeef/btcd/wire"
+	"github.com/roasbeef/btcd/chaincfg/chainhash"
 )
 
 // ChannelAnnouncement message is used to announce the existence of a channel
@@ -56,12 +56,12 @@ func (a *ChannelAnnouncement) Validate() error {
 
 	var sigHash []byte
 
-	sigHash = wire.DoubleSha256(a.FirstNodeID.SerializeCompressed())
+	sigHash = chainhash.DoubleHashB(a.FirstNodeID.SerializeCompressed())
 	if !a.FirstBitcoinSig.Verify(sigHash, a.FirstBitcoinKey) {
 		return errors.New("can't verify first bitcoin signature")
 	}
 
-	sigHash = wire.DoubleSha256(a.SecondNodeID.SerializeCompressed())
+	sigHash = chainhash.DoubleHashB(a.SecondNodeID.SerializeCompressed())
 	if !a.SecondBitcoinSig.Verify(sigHash, a.SecondBitcoinKey) {
 		return errors.New("can't verify second bitcoin signature")
 	}
@@ -70,7 +70,7 @@ func (a *ChannelAnnouncement) Validate() error {
 	if err != nil {
 		return err
 	}
-	dataHash := wire.DoubleSha256(data)
+	dataHash := chainhash.DoubleHashB(data)
 
 	if !a.FirstNodeSig.Verify(dataHash, a.FirstNodeID) {
 		return errors.New("can't verify data in first node signature")