revert back to multiconfig

common/platform/ctlcmd/ctlcmd.go

@@ -4,6 +4,7 @@ import (
 	"io"
 	"os"
 	"os/exec"
+	"strings"
 
 	"v2ray.com/core/common/buf"
 	"v2ray.com/core/common/platform"
@@ -35,10 +36,15 @@ func Run(args []string, input io.Reader) (buf.MultiBuffer, error) {
 	if err := cmd.Wait(); err != nil {
 		msg := "failed to execute v2ctl"
 		if errBuffer.Len() > 0 {
-			msg += ": " + errBuffer.MultiBuffer.String()
+			msg += ": \n" + strings.TrimSpace(errBuffer.MultiBuffer.String())
 		}
 		return nil, newError(msg).Base(err)
 	}
 
+	// log stderr, info message
+	if !errBuffer.IsEmpty() {
+		newError("<v2ctl message> \n", strings.TrimSpace(errBuffer.MultiBuffer.String())).AtInfo().WriteToLog()
+	}
+
 	return outBuffer.MultiBuffer, nil
 }