dnsfilter -- compare full hashes when parsing parental lookup result.

Closes #337.

dnsfilter/dnsfilter.go

@@ -542,6 +542,7 @@ func (d *Dnsfilter) checkParental(host string) (Result, error) {
 			Blocked   bool   `json:"blocked"`
 			ClientTTL int    `json:"clientTtl"`
 			Reason    string `json:"reason"`
+			Hash      string `json:"hash"`
 		}
 		err := json.Unmarshal(body, &m)
 		if err != nil {
@@ -553,6 +554,9 @@ func (d *Dnsfilter) checkParental(host string) (Result, error) {
 		result := Result{}
 
 		for i := range m {
+			if !hashes[m[i].Hash] {
+				continue
+			}
 			if m[i].Blocked {
 				result.IsFiltered = true
 				result.Reason = FilteredParental

dnsfilter/dnsfilter_test.go

@@ -356,6 +356,8 @@ func TestParentalControl(t *testing.T) {
 	if stats.Parental.Requests != l {
 		t.Errorf("Parental lookup negative cache is not working")
 	}
+
+	d.checkMatchEmpty(t, "api.jquery.com")
 }
 
 func TestSafeSearch(t *testing.T) {