Improve paths longer than 256 on Windows failing to hardlink

(cherry picked from commit a97fbcc40a6247bf59678425cf460588fd4dbecd)

src/NzbDrone.Windows/Disk/DiskProvider.cs

@@ -170,6 +170,11 @@ namespace NzbDrone.Windows.Disk
         {
             try
             {
+                if (source.Length > 256 && !source.StartsWith(@"\\?\"))
+                {
+                    source = @"\\?\" + source;
+                }
+
                 return CreateHardLink(destination, source, IntPtr.Zero);
             }
             catch (Exception ex)