AME-1286, Document the Varnish Cache Policy Agent; CR-1466

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@5051 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
CR-1528. AME-297.

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@5052 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
AME-1286, Document the Varnish Cache Policy Agent; CR-1466

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@5053 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
OPENAM-2331, Description of callbacks in the Dev Guide need to be updated: CR-1515

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@5054 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d