Add methods for client options builder

MQTTnet.Core/Client/MqttClientOptionsBuilder.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using MQTTnet.Core.Serializer;
 
 namespace MQTTnet.Core.Client
@@ -79,6 +80,24 @@ namespace MQTTnet.Core.Client
             return this;
         }
 
+        public MqttClientOptionsBuilder WithTls(
+            bool allowUntrustedCertificates = false,
+            bool ignoreCertificateChainErrors = false,
+            bool ignoreCertificateRevocationErrors = false,
+            params byte[][] certificates)
+        {
+            _tlsOptions = new MqttClientTlsOptions
+            {
+                UseTls = true,
+                AllowUntrustedCertificates = allowUntrustedCertificates,
+                IgnoreCertificateChainErrors = ignoreCertificateChainErrors,
+                IgnoreCertificateRevocationErrors = ignoreCertificateRevocationErrors,
+                Certificates = certificates.ToList()
+            };
+
+            return this;
+        }
+
         public MqttClientOptionsBuilder WithTls()
         {
             _tlsOptions = new MqttClientTlsOptions