PortNumber -> Port

On default because it's unrelated to any bug and it's a trivial
change.

Author: Alexandru Scvortov

projects/client/RabbitMQ.Client/src/client/api/ConnectionFactory.cs

@@ -64,7 +64,7 @@ namespace RabbitMQ.Client
     ///     factory.VirtualHost = ConnectionFactory.DefaultVHost;
     ///     factory.Protocol = Protocols.FromEnvironment();
     ///     factory.HostName = hostName;
-    ///     factory.PortNumber = AmqpTcpEndpoint.UseDefaultPort;
+    ///     factory.Port     = AmqpTcpEndpoint.UseDefaultPort;
     ///     //
     ///     IConnection conn = factory.CreateConnection();
     ///     //