Add configuration items to determine DNS records returned and sort order

config/fido.php

@@ -43,4 +43,18 @@ return [
 		'down' => 35,
 		'delist' => 45,
 	],
+
+	// IP Address Resolution preferences
+	'ip' => [
+		'AAAA' => [
+			'enabled' => env('FIDO_DNS_AAAA',TRUE),
+			'order' => env('FIDO_DNS_ORDER_AAAA',2),
+			'type' => DNS_AAAA,
+		],
+		'A' => [
+			'enabled' => env('FIDO_DNS_A',TRUE),
+			'order' => env('FIDO_DNS_ORDER__ORDER',1),
+			'type' => DNS_A,
+		],
+	],
 ];