fix filer.sync missing source srv uploaded files to target when target down

weed/filer/filer.go

@@ -85,7 +85,7 @@ func (f *Filer) MaybeBootstrapFromPeers(self pb.ServerAddress, existingNodes []*
 	err = pb.FollowMetadata(pb.ServerAddress(earliestNode.Address), f.GrpcDialOption, "bootstrap", int32(f.UniqueFileId), "/", nil,
 		0, snapshotTime.UnixNano(), f.Signature, func(resp *filer_pb.SubscribeMetadataResponse) error {
 			return Replay(f.Store, resp)
-		}, true)
+		}, pb.FatalOnError)
 	return
 }