Merge pull request #4709 from BaronGreenback/PluginDowngrade

(cherry picked from commit 406ae3e43a)
Signed-off-by: Joshua M. Boniface <joshua@boniface.me>

MediaBrowser.Model/Configuration/ServerConfiguration.cs

@@ -456,5 +456,15 @@ namespace MediaBrowser.Model.Configuration
         /// Gets or sets the how many metadata refreshes can run concurrently.
         /// </summary>
         public int LibraryMetadataRefreshConcurrency { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether older plugins should automatically be deleted from the plugin folder.
+        /// </summary>
+        public bool RemoveOldPlugins { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether plugin image should be disabled.
+        /// </summary>
+        public bool DisablePluginImages { get; set; }
     }
 }