Hysteria: Fix transport's "udphop without salamander" dialing issue; Require "version": 2 in outbound's settings as well (#5537)

Updated example: https://github.com/XTLS/Xray-core/pull/5508#issue-3795798712

infra/conf/hysteria.go

@@ -1,19 +1,25 @@
 package conf
 
 import (
+	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/proxy/hysteria"
 	"google.golang.org/protobuf/proto"
 )
 
 type HysteriaClientConfig struct {
+	Version int32    `json:"version"`
 	Address *Address `json:"address"`
 	Port    uint16   `json:"port"`
 }
 
 func (c *HysteriaClientConfig) Build() (proto.Message, error) {
-	config := new(hysteria.ClientConfig)
+	if c.Version != 2 {
+		return nil, errors.New("version != 2")
+	}
 
+	config := &hysteria.ClientConfig{}
+	config.Version = c.Version
 	config.Server = &protocol.ServerEndpoint{
 		Address: c.Address.Build(),
 		Port:    uint32(c.Port),

infra/conf/transport_internet.go

@@ -453,7 +453,7 @@ func (c *HysteriaConfig) Build() (proto.Message, error) {
 	}
 
 	config := &hysteria.Config{}
-	config.Version = int32(c.Version)
+	config.Version = c.Version
 	config.Auth = c.Auth
 	config.Up = up
 	config.Down = down