In A.33. Kerberos Module Options in Reference there is option useTicketCache with misspell in description, there is GTG, but it should be TGT.
Moving to ON_QA. The changes should be available for review on the documentation stage within an hour or so from this comment. http://documentation-devel.engineering.redhat.com/site/documentation/en-US/JBoss_Enterprise_Application_Platform/
Verified on stage.