feat(transport): add transport tls config (#1267)

* add http tls config

* add grpc tls config

* add examples tls

* fix resolver parseTarget

* support https for discovery

* add isSecure
* clean code

Co-authored-by: longXboy <longxboyhi@gmail.com>
Co-authored-by: 包子 <baozhecheng@foxmail.com>

examples/helloworld/client/main.go

@@ -27,6 +27,7 @@ func callHTTP() {
 	if err != nil {
 		panic(err)
 	}
+	defer conn.Close()
 	client := pb.NewGreeterHTTPClient(conn)
 	reply, err := client.SayHello(context.Background(), &pb.HelloRequest{Name: "kratos"})
 	if err != nil {
@@ -55,6 +56,7 @@ func callGRPC() {
 	if err != nil {
 		panic(err)
 	}
+	defer conn.Close()
 	client := pb.NewGreeterClient(conn)
 	reply, err := client.SayHello(context.Background(), &pb.HelloRequest{Name: "kratos"})
 	if err != nil {

examples/helloworld/server/main.go

@@ -39,18 +39,18 @@ func (s *server) SayHello(ctx context.Context, in *helloworld.HelloRequest) (*he
 
 func main() {
 	s := &server{}
-	grpcSrv := grpc.NewServer(
-		grpc.Address(":9000"),
-		grpc.Middleware(
-			recovery.Recovery(),
-		),
-	)
 	httpSrv := http.NewServer(
 		http.Address(":8000"),
 		http.Middleware(
 			recovery.Recovery(),
 		),
 	)
+	grpcSrv := grpc.NewServer(
+		grpc.Address(":9000"),
+		grpc.Middleware(
+			recovery.Recovery(),
+		),
+	)
 	helloworld.RegisterGreeterServer(grpcSrv, s)
 	helloworld.RegisterGreeterHTTPServer(httpSrv, s)