filtering: fix doc

internal/filtering/filtering.go

@@ -378,6 +378,10 @@ type Result struct {
 
 	// ReverseHosts is the reverse lookup rewrite result.  It is empty unless
 	// Reason is set to RewrittenAutoHosts.
+	//
+	// TODO(e.burkov):  There is no need for AutoHosts-related fields any more
+	// since the hosts container now uses $dnsrewrite rules.  These fields are
+	// only used in query log to decode old format.
 	ReverseHosts []string `json:",omitempty"`
 
 	// IPList is the lookup rewrite result.  It is empty unless Reason is set to
@@ -476,10 +480,9 @@ func (d *DNSFilter) matchSysHosts(
 		// Check DNS rewrites first, because the API there is a bit awkward.
 		res = d.processDNSRewrites(dnsr)
 		res.Reason = RewrittenAutoHosts
-		// TODO(e.burkov):  !! Put the real issue number.
 		// TODO(e.burkov):  Put real hosts-syntax rules.
 		//
-		// See https://github.com/AdguardTeam/AdGuardHome/issues/XXXX.
+		// See https://github.com/AdguardTeam/AdGuardHome/issues/3846.
 		res.Rules = nil
 	}