multi: fixing it's/its typos in comments

lnwallet/btcwallet/btcwallet.go

@@ -272,7 +272,7 @@ func (b *BtcWallet) FetchRootKey() (*btcec.PrivateKey, error) {
 
 	if rootAddrHash == nil {
 		// Otherwise, we need to generate a fresh address from the
-		// wallet, then stores it's hash160 within the database so we
+		// wallet, then stores its hash160 within the database so we
 		// can look up the exact key later.
 		if err := walletdb.Update(b.db, func(tx walletdb.ReadWriteTx) error {
 			addrmgrNs := tx.ReadWriteBucket(waddrmgrNamespaceKey)

lnwallet/channel.go

@@ -997,7 +997,7 @@ func (u *updateLog) appendHtlc(pd *PaymentDescriptor) {
 	u.logIndex++
 }
 
-// lookupHtlc attempts to look up an offered HTLC according to it's offer
+// lookupHtlc attempts to look up an offered HTLC according to its offer
 // index. If the entry isn't found, then a nil pointer is returned.
 func (u *updateLog) lookupHtlc(i uint64) *PaymentDescriptor {
 	htlc, ok := u.htlcIndex[i]
@@ -2597,7 +2597,7 @@ func (lc *LightningChannel) createCommitDiff(
 		}
 
 		// Knowing that this update is a part of this new commitment,
-		// we'll create a log update and not it's index in the log so
+		// we'll create a log update and not its index in the log so
 		// we can later restore it properly if a restart occurs.
 		logUpdate := channeldb.LogUpdate{
 			LogIndex: pd.LogIndex,

lnwallet/script_utils.go

@@ -373,7 +373,7 @@ func senderHtlcSpendTimeout(receiverSig []byte, signer Signer,
 // receiverHTLCScript constructs the public key script for an incoming HTLC
 // output payment for the receiver's version of the commitment transaction. The
 // possible execution paths from this script include:
-//   * The receiver of the HTLC uses it's second level HTLC transaction to
+//   * The receiver of the HTLC uses its second level HTLC transaction to
 //     advance the state of the HTLC into the delay+claim state.
 //   * The sender of the HTLC sweeps all the funds of the HTLC as a breached
 //     commitment was broadcast.

lnwallet/wallet.go

@@ -1097,7 +1097,7 @@ func (l *LightningWallet) handleFundingCounterPartySigs(msg *addCounterPartySigs
 	res.partialState.LocalChanCfg = res.ourContribution.toChanConfig()
 	res.partialState.RemoteChanCfg = res.theirContribution.toChanConfig()
 
-	// Add the complete funding transaction to the DB, in it's open bucket
+	// Add the complete funding transaction to the DB, in its open bucket
 	// which will be used for the lifetime of this channel.
 	// TODO(roasbeef):
 	//  * attempt to retransmit funding transactions on re-start