Implement syncplay permissions for a user

MediaBrowser.Model/Configuration/SyncplayAccess.cs

@@ -0,0 +1,23 @@
+namespace MediaBrowser.Model.Configuration
+{
+    /// <summary>
+    /// Enum SyncplayAccess.
+    /// </summary>
+    public enum SyncplayAccess
+    {
+        /// <summary>
+        /// User can create groups and join them.
+        /// </summary>
+        CreateAndJoinGroups,
+
+        /// <summary>
+        /// User can only join already existing groups.
+        /// </summary>
+        JoinGroups,
+
+        /// <summary>
+        /// Syncplay is disabled for the user.
+        /// </summary>
+        None
+    }
+}