fix linting problems

endpoints/endpoints.go

@@ -40,7 +40,7 @@ func Watch(ctx context.Context, c *k8s.Client, changes chan error, namespace str
 		changes <- errors.Wrap(err, "failed to watch namespace")
 		return errors.Wrap(err, "failed to watch namespace")
 	}
-	defer w.Close()
+	defer w.Close() // nolint: errcheck
 
 	for ctx.Err() == nil {
 		ep := new(corev1.Endpoints)

kamailio/kamailio.go

@@ -31,7 +31,7 @@ func newClientCodec(conn io.ReadWriteCloser) *binRPCClientCodec {
 func InvokeMethod(method string, host string, port string) error {
 
 	conn, err := net.Dial("udp", host+":"+port)
-	defer conn.Close()
+	defer conn.Close() // nolint
 
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to kamailio RPC server")

main.go

@@ -155,7 +155,7 @@ func (s *dispatcherSets) export() error {
 	if err != nil {
 		return errors.Wrap(err, "failed to open dispatchers file for writing")
 	}
-	defer f.Close()
+	defer f.Close() // nolint: errcheck
 
 	for _, v := range s.sets {
 		_, err = f.WriteString(v.Export())

sets/sets.go

@@ -38,9 +38,7 @@ type staticSet struct {
 	Members []string
 }
 
-func (s *staticSet) Close() {
-	return
-}
+func (s *staticSet) Close() {}
 
 func (s *staticSet) ID() int {
 	return s.id