Added the changes to the Execute() method for the new StaleDataCheck property.
Added the changes to the Execute() method for the new StaleDataCheck property.

hgupta9/FluentFTP,shaneray/ShaneSpace.FtpClient,robinrodricks/FluentFTP,worstenbrood/FluentFTP,robinrodricks/FluentFTP,kendallb/System.Net.FtpClient,shaneray/ShaneSpace.FtpClient,robinrodricks/FluentFTP