Revert "tried to add more clarity, especially re: pam_cas"

This reverts commit f3223167133d587472c99a5814e5abcbb4fa6e2c.
Revert "tried to clean up style, tabs, comments. fixed setPGTStorageFile call for phpCAS 1.3.x"

This reverts commit 5185a14c16d8320af872dba803afd17c8e910f00.