Refactoring of WebSocket support

MQTTnet.Core/Client/ConnectionType.cs

@@ -1,14 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace MQTTnet.Core.Client
-{
-    public enum ConnectionTypes
-    {
-        TCP,
-        TLS,
-        WS,
-        WSS
-    }
-}

MQTTnet.Core/Client/MqttClientOptions.cs

@@ -25,6 +25,6 @@ namespace MQTTnet.Core.Client
 
         public MqttProtocolVersion ProtocolVersion { get; set; } = MqttProtocolVersion.V311;
 
-        public ConnectionTypes ConnectionType { get; set; } = ConnectionTypes.TCP;
+        public MqttConnectionType ConnectionType { get; set; } = MqttConnectionType.Tcp;
     }
 }

MQTTnet.Core/Client/MqttConnectionType.cs

@@ -0,0 +1,10 @@
+namespace MQTTnet.Core.Client
+{
+    public enum MqttConnectionType
+    {
+        Tcp,
+        Tls,
+        Ws,
+        Wss
+    }
+}