Fix build

BTCPayServer/Controllers/HomeController.cs

@@ -50,6 +50,7 @@ namespace BTCPayServer.Controllers
             try
             {
                 BitcoinUrlBuilder urlBuilder = new BitcoinUrlBuilder(vm.BitpayLink);
+#pragma warning disable CS0618 // Type or member is obsolete
                 if (!urlBuilder.PaymentRequestUrl.DnsSafeHost.EndsWith("bitpay.com", StringComparison.OrdinalIgnoreCase))
                 {
                     throw new Exception("This tool only work with bitpay");
@@ -57,6 +58,7 @@ namespace BTCPayServer.Controllers
 
                 var client = HttpClientFactory.CreateClient();
                 HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, urlBuilder.PaymentRequestUrl);
+#pragma warning restore CS0618 // Type or member is obsolete
                 request.Headers.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/payment-request"));
                 var result = await client.SendAsync(request);
                 // {"network":"main","currency":"BTC","requiredFeeRate":29.834,"outputs":[{"amount":255900,"address":"1PgPo5d4swD6pKfCgoXtoW61zqTfX9H7tj"}],"time":"2018-12-03T14:39:47.162Z","expires":"2018-12-03T14:54:47.162Z","memo":"Payment request for BitPay invoice HHfG8cprRMzZG6MErCqbjv for merchant VULTR Holdings LLC","paymentUrl":"https://bitpay.com/i/HHfG8cprRMzZG6MErCqbjv","paymentId":"HHfG8cprRMzZG6MErCqbjv"}