cosmetic: resolve some more linter complaints

nameserver/mdns_client.go

@@ -214,7 +214,7 @@ func (c *MDNSClient) ResponseCallback(r *dns.Msg) {
 			}
 
 			if query, found := c.inflight[name]; found {
-				newResponseInfos := make([]*responseInfo, 0)
+				var newResponseInfos []*responseInfo
 				for _, resp := range query.responseInfos {
 					resp.ch <- res
 					// insistent queries are not removed on the first reply, but on the timeout

nameserver/mdns_lookup.go

@@ -6,7 +6,7 @@ import (
 )
 
 func mdnsLookup(client *MDNSClient, name string, qtype uint16, insistent bool) ([]ZoneRecord, error) {
-	responses := make([]*Response, 0)
+	var responses []*Response
 	channel := make(chan *Response)
 	client.SendQuery(name, qtype, insistent, channel)
 

nameserver/mdns_server_test.go

@@ -26,7 +26,7 @@ func TestServerSimpleQuery(t *testing.T) {
 	wt.AssertNoErr(t, err)
 	defer mdnsServer.Stop()
 
-	receivedAddrs := make([]net.IP, 0)
+	var receivedAddrs []net.IP
 	receivedName := ""
 	recvChan := make(chan interface{})
 	receivedCount := 0

nameserver/mocks_test.go

@@ -35,7 +35,7 @@ func (mz *mockedZoneWithRecords) LookupName(name string) ([]ZoneRecord, error) {
 	defer mz.Unlock()
 
 	mz.NumLookupsName++
-	res := make([]ZoneRecord, 0)
+	var res []ZoneRecord
 	for _, r := range mz.records {
 		if r.Name() == name {
 			res = append(res, r)
@@ -50,7 +50,7 @@ func (mz *mockedZoneWithRecords) LookupInaddr(inaddr string) ([]ZoneRecord, erro
 	defer mz.Unlock()
 
 	mz.NumLookupsInaddr++
-	res := make([]ZoneRecord, 0)
+	var res []ZoneRecord
 	for _, r := range mz.records {
 		revIP, err := raddrToIP(inaddr)
 		if err != nil {