build+multi: switch from bolt to bbolt

In this commit, we switch from boltbd/bolt to coreos/bbolt as the
former is no longer being actively maintained.

htlcswitch/circuit_map.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"sync"
 
-	"github.com/boltdb/bolt"
+	"github.com/coreos/bbolt"
 	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/lnwire"

htlcswitch/sequencer.go

@@ -3,7 +3,7 @@ package htlcswitch
 import (
 	"sync"
 
-	"github.com/boltdb/bolt"
+	"github.com/coreos/bbolt"
 	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lnd/channeldb"
 )

htlcswitch/switch.go

@@ -9,7 +9,7 @@ import (
 
 	"crypto/sha256"
 
-	"github.com/boltdb/bolt"
+	"github.com/coreos/bbolt"
 	"github.com/davecgh/go-spew/spew"
 	"github.com/roasbeef/btcd/btcec"
 

htlcswitch/test_utils.go

@@ -14,7 +14,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/boltdb/bolt"
+	"github.com/coreos/bbolt"
 	"github.com/btcsuite/fastsha256"
 	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lightning-onion"