Sync with mattermost 3.2.0

vendor/github.com/mattermost/platform/model/saml.go

@@ -0,0 +1,18 @@
+// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package model
+
+const (
+	USER_AUTH_SERVICE_SAML      = "saml"
+	USER_AUTH_SERVICE_SAML_TEXT = "With SAML"
+	SAML_IDP_CERTIFICATE        = 1
+	SAML_PRIVATE_KEY            = 2
+	SAML_PUBLIC_CERT            = 3
+)
+
+type SamlAuthRequest struct {
+	Base64AuthRequest string
+	URL               string
+	RelayState        string
+}