internal/router/dnsmasq: disable cache

So multiple upstreams config could work properly.

internal/router/openwrt/openwrt.go

@@ -1,18 +1,14 @@
 package openwrt
 
 import (
-	"bytes"
-	"errors"
 	"fmt"
 	"os"
 	"os/exec"
-	"strings"
-
-	"github.com/Control-D-Inc/ctrld/internal/router/dnsmasq"
 
 	"github.com/kardianos/service"
 
 	"github.com/Control-D-Inc/ctrld"
+	"github.com/Control-D-Inc/ctrld/internal/router/dnsmasq"
 )
 
 const (
@@ -20,8 +16,6 @@ const (
 	openwrtDNSMasqConfigPath = "/tmp/dnsmasq.d/ctrld.conf"
 )
 
-var errUCIEntryNotFound = errors.New("uci: Entry not found")
-
 type Openwrt struct {
 	cfg *ctrld.Config
 }
@@ -59,10 +53,6 @@ func (o *Openwrt) Setup() error {
 	if err := os.WriteFile(openwrtDNSMasqConfigPath, []byte(data), 0600); err != nil {
 		return err
 	}
-	// Commit.
-	if _, err := uci("commit"); err != nil {
-		return err
-	}
 	// Restart dnsmasq service.
 	if err := restartDNSMasq(); err != nil {
 		return err
@@ -91,17 +81,3 @@ func restartDNSMasq() error {
 	}
 	return nil
 }
-
-func uci(args ...string) (string, error) {
-	cmd := exec.Command("uci", args...)
-	var stdout, stderr bytes.Buffer
-	cmd.Stdout = &stdout
-	cmd.Stderr = &stderr
-	if err := cmd.Run(); err != nil {
-		if strings.HasPrefix(stderr.String(), errUCIEntryNotFound.Error()) {
-			return "", errUCIEntryNotFound
-		}
-		return "", fmt.Errorf("%s:%w", stderr.String(), err)
-	}
-	return strings.TrimSpace(stdout.String()), nil
-}