Remove the default CacheKeyBaseURL value, it doesn't have any.

Improve syntax highlight and hyper-links.
(r1851152 in trunk)

s/authorisation/authorization/ to be consitent
(r1516864 in trunk)

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1851155 13f79535-47bb-0310-9956-ffa450edef68