Cleanup Cookie handling in HttpClient

src/NzbDrone.Common/Http/HttpClient.cs

@@ -200,7 +200,7 @@ namespace NzbDrone.Common.Http
 
         private void HandleResponseCookies(HttpResponse response, CookieContainer cookieContainer)
         {
-            var cookieHeaders = response.GetCookieHeaders();
+            var cookieHeaders = response.Cookies;
             if (cookieHeaders.Empty())
             {
                 return;
@@ -212,11 +212,11 @@ namespace NzbDrone.Common.Http
                 {
                     var persistentCookieContainer = _cookieContainerCache.Get("container", () => new CookieContainer());
 
-                    foreach (var cookieHeader in cookieHeaders)
+                    foreach (Cookie cookieHeader in cookieHeaders)
                     {
                         try
                         {
-                            persistentCookieContainer.SetCookies((Uri)response.Request.Url, cookieHeader);
+                            persistentCookieContainer.Add((Uri)response.Request.Url, cookieHeader);
                         }
                         catch (Exception ex)
                         {

src/NzbDrone.Common/Http/HttpResponse.cs

@@ -59,11 +59,6 @@ namespace NzbDrone.Common.Http
                                        StatusCode == HttpStatusCode.TemporaryRedirect ||
                                        StatusCode == HttpStatusCode.Found;
 
-        public string[] GetCookieHeaders()
-        {
-            return Headers.GetValues("Set-Cookie") ?? Array.Empty<string>();
-        }
-
         public Dictionary<string, string> GetCookies()
         {
             var result = new Dictionary<string, string>();