Missing resource type for application-http-authentication

Book: How to Configure Server Security
Revision: 6bff93b8
Section: 2.1.2.7. Using the Out of the Box Elytron Components

Issue description:
In section 2.1.2.7. Using the Out of the Box Elytron Components there is mentioned "application-http-authentication". However "application-http-authentication" is name of "http-authentication-factory" resource. This resource should be also mentioned in the first occurence of "application-http-authentication".

Suggestions for improvement:
Rewrite "The elytron subsystem provides application-http-authentication by default ..." to "The elytron subsystem provides http-authentication-factory application-http-authentication by default ..."