Add wireguard outbound and test

inbound/default.go

@@ -325,7 +325,7 @@ func (a *myInboundAdapter) NewError(ctx context.Context, err error) {
 func NewError(logger log.ContextLogger, ctx context.Context, err error) {
 	common.Close(err)
 	if E.IsClosedOrCanceled(err) {
-		logger.TraceContext(ctx, "connection closed: ", err)
+		logger.DebugContext(ctx, "connection closed: ", err)
 		return
 	}
 	logger.ErrorContext(ctx, err)