Fix misleading and inaccurate stmt in "3.2. Deploying a RESTEasy application to WildFly"

3.2. Deploying a RESTEasy application to WildFly
states "A simple way to configure an application is by simply providing 
an empty web.xml file."

This statement is misleading and inaccurate.  One provides a web.xml file
that only contains the web-app element with no sub-elements as shown below.