Revise cookie handling (#315)

* Fixed: Revised handling of cookies in case of redirects.

* Revised deletion of cookies.

src/NzbDrone.Common/Http/HttpRequest.cs

@@ -13,8 +13,10 @@ namespace NzbDrone.Common.Http
             Url = new HttpUri(url);
             Headers = new HttpHeader();
             AllowAutoRedirect = true;
+            StoreRequestCookie = true;
             Cookies = new Dictionary<string, string>();
-            
+
+
             if (!RuntimeInfo.IsProduction)
             {
                 AllowAutoRedirect = false;
@@ -37,6 +39,7 @@ namespace NzbDrone.Common.Http
         public bool ConnectionKeepAlive { get; set; }
         public bool LogResponseContent { get; set; }
         public Dictionary<string, string> Cookies { get; private set; }
+        public bool StoreRequestCookie { get; set; }
         public bool StoreResponseCookie { get; set; }
         public TimeSpan RequestTimeout { get; set; }
         public TimeSpan RateLimit { get; set; }