Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/aspnetwebstack/src/System.Web.Http.SelfHost/Channels/HttpBindingSecurityMode.cs

@@ -0,0 +1,26 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+
+namespace System.Web.Http.SelfHost.Channels
+{
+    /// <summary>
+    /// Defines the modes of security that can be used to configure a service endpoint that uses the
+    /// <see cref="HttpBinding"/>.
+    /// </summary>
+    public enum HttpBindingSecurityMode
+    {
+        /// <summary>
+        /// Indicates no security is used with HTTP requests.
+        /// </summary>
+        None,
+
+        /// <summary>
+        /// Indicates that transport-level security is used with HTTP requests.
+        /// </summary>
+        Transport,
+
+        /// <summary>
+        /// Indicates that only HTTP-based client authentication is provided.
+        /// </summary>
+        TransportCredentialOnly,
+    }
+}