Encrypted DNS health, comparing a zone's views, --local everywhere

jarld checks the DoT and DoH listeners every 10 minutes as a client would (page, dashboard, jarl encrypted-dns health, jarl_encrypted_dns_up). The Compare views tab and jarl zone diff show what differs between a zone's views, with Use this version. --local works on unlinked zones. A changed certificates.dir is followed by encrypted DNS's tls statements. Sharing an already shared version replaces other views' overrides.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/encdns/encdns.go

@@ -272,9 +272,7 @@ func Plan(st *model.State, s Setup, certDir string) ([]engine.Request, []string,
 		return nil, nil, fmt.Errorf("choose at least one address to listen on")
 	}
 	tlsName := Prefix + s.Certificate
-	dir := filepath.Join(certDir, s.Certificate)
-	tlsValue := fmt.Sprintf(`%s { cert-file "%s"; key-file "%s"; protocols { TLSv1.2; TLSv1.3; }; }`,
-		tlsName, filepath.Join(dir, "fullchain.pem"), filepath.Join(dir, "privkey.pem"))
+	tlsValue := TLSValue(s.Certificate, certDir)
 
 	var reqs []engine.Request
 	// Take out the earlier setup's listeners and tls statements.
@@ -393,3 +391,11 @@ func Private(a netip.Addr) bool {
 	a = a.Unmap()
 	return a.IsPrivate() || a.IsLoopback() || a.IsLinkLocalUnicast() || netip.MustParsePrefix("100.64.0.0/10").Contains(a)
 }
+
+// TLSValue is the tls statement the setup writes for a certificate whose
+// files are in certDir/NAME.
+func TLSValue(cert, certDir string) string {
+	dir := filepath.Join(certDir, cert)
+	return fmt.Sprintf(`%s { cert-file "%s"; key-file "%s"; protocols { TLSv1.2; TLSv1.3; }; }`,
+		Prefix+cert, filepath.Join(dir, "fullchain.pem"), filepath.Join(dir, "privkey.pem"))
+}