Send Http auth without waiting for challenge.

src/NzbDrone.Common/Http/Dispatchers/CurlHttpDispatcher.cs

@@ -41,13 +41,6 @@ namespace NzbDrone.Common.Http.Dispatchers
                 throw new ApplicationException("Curl failed to initialize.");
             }
 
-            if (request.NetworkCredential != null)
-            {
-                var authInfo = request.NetworkCredential.UserName + ":" + request.NetworkCredential.Password;
-                authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo));
-                request.Headers["Authorization"] = "Basic " + authInfo;
-            }
-
             lock (CurlGlobalHandle.Instance)
             {
                 Stream responseStream = new MemoryStream();
@@ -66,7 +59,7 @@ namespace NzbDrone.Common.Http.Dispatchers
                         headerStream.Write(b, 0, s * n);
                         return s * n;
                     };
-                    
+
                     curlEasy.Url = request.Url.FullUri;
                     switch (request.Method)
                     {

src/NzbDrone.Common/Http/Dispatchers/ManagedHttpDispatcher.cs

@@ -15,18 +15,12 @@ namespace NzbDrone.Common.Http.Dispatchers
             //http://stackoverflow.com/questions/8490718/how-to-decompress-stream-deflated-with-java-util-zip-deflater-in-net
             webRequest.AutomaticDecompression = DecompressionMethods.GZip;
 
-            webRequest.Credentials = request.NetworkCredential;
             webRequest.Method = request.Method.ToString();
             webRequest.UserAgent = UserAgentBuilder.UserAgent;
             webRequest.KeepAlive = false;
             webRequest.AllowAutoRedirect = request.AllowAutoRedirect;
             webRequest.CookieContainer = cookies;
 
-            if (request.NetworkCredential != null)
-            {
-                webRequest.PreAuthenticate = true;
-            }
-
             if (request.RequestTimeout != TimeSpan.Zero)
             {
                 webRequest.Timeout = (int)Math.Ceiling(request.RequestTimeout.TotalMilliseconds);

src/NzbDrone.Common/Http/HttpRequest.cs

@@ -33,7 +33,6 @@ namespace NzbDrone.Common.Http
         public HttpHeader Headers { get; set; }
         public byte[] ContentData { get; set; }
         public string ContentSummary { get; set; }
-        public NetworkCredential NetworkCredential { get; set; }
         public bool SuppressHttpError { get; set; }
         public bool AllowAutoRedirect { get; set; }
         public Dictionary<string, string> Cookies { get; private set; }

src/NzbDrone.Common/Http/HttpRequestBuilder.cs

@@ -98,7 +98,13 @@ namespace NzbDrone.Common.Http
             request.Method = Method;
             request.SuppressHttpError = SuppressHttpError;
             request.AllowAutoRedirect = AllowAutoRedirect;
-            request.NetworkCredential = NetworkCredential;
+
+            if (NetworkCredential != null)
+            {
+                var authInfo = NetworkCredential.UserName + ":" + NetworkCredential.Password;
+                authInfo = Convert.ToBase64String(Encoding.GetEncoding("ISO-8859-1").GetBytes(authInfo));
+                request.Headers.Set("Authorization", "Basic " + authInfo);
+            }
 
             foreach (var header in Headers)
             {