chore: rename bootstrap to refresh

As pointed out by raul, bootstrapping and refreshing are not the same thing.
Bootstrapping is the initial setup (i.e., connect to some initial nodes to get
started). Refreshing is the process of refreshing the routing table.

dht.go

@@ -67,10 +67,10 @@ type IpfsDHT struct {
 
 	bucketSize int
 
-	autoBootstrap    bool
-	bootstrapTimeout time.Duration
-	bootstrapPeriod  time.Duration
-	triggerBootstrap chan struct{}
+	autoRefresh           bool
+	rtRefreshQueryTimeout time.Duration
+	rtRefreshPeriod       time.Duration
+	triggerRtRefresh      chan struct{}
 }
 
 // Assert that IPFS assumptions about interfaces aren't broken. These aren't a
@@ -91,9 +91,9 @@ func New(ctx context.Context, h host.Host, options ...opts.Option) (*IpfsDHT, er
 		return nil, err
 	}
 	dht := makeDHT(ctx, h, cfg.Datastore, cfg.Protocols, cfg.BucketSize)
-	dht.autoBootstrap = cfg.AutoBootstrap
-	dht.bootstrapPeriod = cfg.BootstrapPeriod
-	dht.bootstrapTimeout = cfg.BootstrapTimeout
+	dht.autoRefresh = cfg.AutoRefresh
+	dht.rtRefreshPeriod = cfg.RoutingTableRefreshPeriod
+	dht.rtRefreshQueryTimeout = cfg.RoutingTableRefreshQueryTimeout
 
 	// register for network notifs.
 	dht.host.Network().Notify((*netNotifiee)(dht))
@@ -112,7 +112,7 @@ func New(ctx context.Context, h host.Host, options ...opts.Option) (*IpfsDHT, er
 			h.SetStreamHandler(p, dht.handleNewStream)
 		}
 	}
-	dht.startBootstrapping()
+	dht.startRefreshing()
 	return dht, nil
 }
 
@@ -163,7 +163,7 @@ func makeDHT(ctx context.Context, h host.Host, dstore ds.Batching, protocols []p
 		routingTable:     rt,
 		protocols:        protocols,
 		bucketSize:       bucketSize,
-		triggerBootstrap: make(chan struct{}),
+		triggerRtRefresh: make(chan struct{}),
 	}
 
 	dht.ctx = dht.newContextWithLocalTags(ctx)