Added the bound IP address to the server options.

Frameworks/MQTTnet.NetStandard/Server/MqttServerTlsEndpointOptions.cs

@@ -1,4 +1,6 @@
-namespace MQTTnet.Server
+using System.Net;
+
+namespace MQTTnet.Server
 {
     public sealed class MqttServerTlsEndpointOptions
     {
@@ -7,5 +9,7 @@
         public int? Port { get; set; }
 
         public byte[] Certificate { get; set; }
+
+        public IPAddress BoundIPAddress { get; set; } = IPAddress.Any;
     }
 }