Fix dns cache

Author: btomaev

lib/policy/policy.go

@@ -43,6 +43,7 @@ type ParsedConfig struct {
 	StatusCodes       config.StatusCodes
 	DefaultDifficulty int
 	DNSBL             bool
+	DnsCache          *dns.DnsCache
 	Dns               *dns.Dns
 	Logger            *slog.Logger
 }
@@ -81,8 +82,8 @@ func ParseConfig(ctx context.Context, fin io.Reader, fname string, defaultDiffic
 		validationErrs = append(validationErrs, config.ErrUnknownStoreBackend)
 	}
 
-	dnsCache := dns.NewDNSCache(result.orig.DNSTTL.Forward, result.orig.DNSTTL.Reverse, result.Store)
-	result.Dns = dns.New(ctx, dnsCache)
+	result.DnsCache = dns.NewDNSCache(result.orig.DNSTTL.Forward, result.orig.DNSTTL.Reverse, result.Store)
+	result.Dns = dns.New(ctx, result.DnsCache)
 
 	for _, b := range c.Bots {
 		if berr := b.Valid(); berr != nil {