CR-1526 Fix for AME-1548: Document web policy agent failover changes

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@4997 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
Fix for OPENAM-2369


git-svn-id: https://svn.forgerock.org/openam/trunk/openam@4998 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d