Maint: move OpenVPN configurator to openvpn/config

internal/openvpn/config.go

@@ -1,30 +0,0 @@
-package openvpn
-
-import (
-	"os"
-	"strings"
-)
-
-type ConfigWriter interface {
-	WriteConfig(lines []string) error
-}
-
-func (c *configurator) WriteConfig(lines []string) error {
-	file, err := os.OpenFile(c.configPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
-	if err != nil {
-		return err
-	}
-	_, err = file.WriteString(strings.Join(lines, "\n"))
-	if err != nil {
-		_ = file.Close()
-		return err
-	}
-
-	err = file.Chown(c.puid, c.pgid)
-	if err != nil {
-		_ = file.Close()
-		return err
-	}
-
-	return file.Close()
-}