Book: Security architecture in revision 864568d5
Section: 2.6.5. Default Set of Implementations (however name of this section will be changed, see JBEAP-11411)

Issue description:
There are wrong description of some resources in 'Default Set of Implementations' section.

• configurable-http-server-mechanism-factory - description is wrong, use description from JBoss CLI - "A HTTP server factory definition that wraps another HTTP server factory and applies the specified configuration and filtering."
• configurable-sasl-server-factory - description is wrong, use description from JBoss CLI - "A SaslServerFactory definition that wraps another SaslServerFactory and applies the specified configuration and filtering."
• aggregate-principal-transformer - description is insufficient, use description from JBoss CLI - "A principal transformer aggregating more principal transformers. Original principal is tried to be transformed by individual transformers until one return non-null principal - that is returned."

Suggestion for improvement:
Mentioned in Issue description.