Cleanup for AME-2089, Branch web agent docs for 3.2.0; CR-1978 and CR-2016

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@5878 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
[CR-2010]   [AME-1990]Include caution about SELinux in release notes, in the Limitations section.

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@5879 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d