https: add load balancing group support (#5032)

server/service.go

@@ -322,6 +322,9 @@ func NewService(cfg *v1.ServerConfig) (*Service, error) {
 		if err != nil {
 			return nil, fmt.Errorf("create vhost httpsMuxer error, %v", err)
 		}
+
+		// Init HTTPS group controller after HTTPSMuxer is created
+		svr.rc.HTTPSGroupCtl = group.NewHTTPSGroupController(svr.rc.VhostHTTPSMuxer)
 	}
 
 	// frp tls listener