Merge pull request #2767 from Bond-009/nullable3

Enable nullabe reference types for MediaBrowser.Model

MediaBrowser.Model/Users/ForgotPasswordResult.cs

@@ -1,3 +1,4 @@
+#nullable disable
 #pragma warning disable CS1591
 
 using System;

MediaBrowser.Model/Users/PinRedeemResult.cs

@@ -1,3 +1,4 @@
+#nullable disable
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Model.Users

MediaBrowser.Model/Users/UserAction.cs

@@ -1,3 +1,4 @@
+#nullable disable
 #pragma warning disable CS1591
 
 using System;

MediaBrowser.Model/Users/UserPolicy.cs

@@ -1,3 +1,4 @@
+#nullable disable
 #pragma warning disable CS1591
 
 using System;