Update mattermost vendor (3.7 => 4.1)

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

@@ -1,3 +1,6 @@
+// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
 package model
 
 import (
@@ -5,6 +8,15 @@ import (
 	"io"
 )
 
+type WebrtcInfoResponse struct {
+	Token        string `json:"token"`
+	GatewayUrl   string `json:"gateway_url"`
+	StunUri      string `json:"stun_uri,omitempty"`
+	TurnUri      string `json:"turn_uri,omitempty"`
+	TurnPassword string `json:"turn_password,omitempty"`
+	TurnUsername string `json:"turn_username,omitempty"`
+}
+
 type GatewayResponse struct {
 	Status string `json:"janus"`
 }
@@ -19,3 +31,23 @@ func GatewayResponseFromJson(data io.Reader) *GatewayResponse {
 		return nil
 	}
 }
+
+func (o *WebrtcInfoResponse) ToJson() string {
+	b, err := json.Marshal(o)
+	if err != nil {
+		return ""
+	} else {
+		return string(b)
+	}
+}
+
+func WebrtcInfoResponseFromJson(data io.Reader) *WebrtcInfoResponse {
+	decoder := json.NewDecoder(data)
+	var o WebrtcInfoResponse
+	err := decoder.Decode(&o)
+	if err == nil {
+		return &o
+	} else {
+		return nil
+	}
+}