Add openvpn and openconnect

include/openconnect.go

@@ -0,0 +1,12 @@
+//go:build with_openconnect
+
+package include
+
+import (
+	"github.com/sagernet/sing-box/adapter/endpoint"
+	"github.com/sagernet/sing-box/protocol/openconnect"
+)
+
+func registerOpenConnectEndpoint(registry *endpoint.Registry) {
+	openconnect.RegisterEndpoint(registry)
+}