* feature: bind user for active_directory auth
Optional, allows the use of "remember me", API, and alerting.
* missing global (but still may not be working)
* always return a value from reauthenticate()
* Make sure the ldapbind credentials are correct on reauth.
Do not send output if they are incorrect (use d_echo) this breaks ajax calls, etc.
Add scripts/auth_test.php, to make it easier to debug authentication.
* Refine auth_test.php a bit more
A few small cleanups in other places of the auth
* Add auth_test.php to docs
Some more improvements in the auth_test.php output.
* Update Authentication.md
* Updated to remove passwords from sessions
* Remove users sessions when user deleted
* Updated when cookies are set
* Updated setcookies to always contain a value
* Added destroy_cookies() to remove users cookies on failed login
* Removed debug line
* Fixed graph issues
