multi: fix linter errors

chainregistry.go

@@ -343,7 +343,7 @@ var (
 	// TODO(roasbeef): extend and collapse these and chainparams.go into
 	// struct like chaincfg.Params
 	chainDNSSeeds = map[chainhash.Hash][]string{
-		bitcoinGenesis: []string{
+		bitcoinGenesis: {
 			"nodes.lightning.directory",
 			//"lseed.bitcoinstats.com",
 		},

discovery/bootstrapper.go

@@ -204,7 +204,7 @@ func (c *ChannelGraphBootstrapper) SampleNodeAddrs(numAddrs uint32,
 			return nil, err
 		}
 
-		tries += 1
+		tries++
 
 		// We'll now rotate our hash accumulator one value forwards.
 		c.hashAccumulator = sha256.Sum256(c.hashAccumulator[:])

server.go

@@ -596,7 +596,7 @@ func (s *server) peerBootstrapper(numTargetPeers uint32,
 			// Finally, we'll launch a new goroutine for each
 			// prospective peer candidates.
 			for _, addr := range peerAddrs {
-				epochAttempts += 1
+				epochAttempts++
 
 				go func(a *lnwire.NetAddress) {
 					// TODO(roasbeef): can do AS, subnet,