[Docs] add extra column for file-handler html content and default HTTP methods

In the Configuration Guide, there is a table with default behavour of HTTP methods called Table A.85. HTTP Method Default Behavior. Currently these include three columns: JSP, Servlet and Static HTML (meaning static HTML in a deployment). We should append a new column with information regarding to the behaviour of HTTP requests against static HTML content served by file-handler which is for example default welcome-content available at http://localhost:8080/index.html URI.

Default behaviour for HTTP methods in this case are: