Add user cinema mode setting

MediaBrowser.Common/Net/HttpRequestOptions.cs

@@ -91,7 +91,7 @@ namespace MediaBrowser.Common.Net
         public bool LogErrorResponseBody { get; set; }
         public bool EnableKeepAlive { get; set; }
 
-        public bool EnableUnconditionalCache { get; set; }
+        public CacheMode CacheMode { get; set; }
         public TimeSpan CacheLength { get; set; }
 
         private string GetHeaderValue(string name)
@@ -125,4 +125,10 @@ namespace MediaBrowser.Common.Net
             RequestContentType = "application/x-www-form-urlencoded";
         }
     }
+
+    public enum CacheMode
+    {
+        None = 1,
+        Unconditional = 2
+    }
 }