Patch SimpleCAS lib and UNL_Auth to allow application to control redir

Adds a configuration option to SimpleCAS that sets a flag to determine
if the client should be automatically redirected to a clean URL after
ticket validation.
Set the SimpleCAS flag for auto redirecting to false

The application handles post validation redirecting already. Let's not
waste a network request.
Patch Peoplefinder lib to allow LDAP driver to skip start TLS

Should only be used when `$ldapServer` is ldaps://.
Add logic for disabling LDAP start TLS if server is ldaps.
Fix logic error in maintenance mode notification display.
Remove the magento survey block from adminhtml layout for UNL theme.

Magento does not actively use it and it's a waste of server resources.
Also use optional start TLS for admin authentication in ldap helper
Fixed ACL not being checked for certain admin notification bars.
Correct copy/paste mistake. Rename string constant to mysql config value
Do not set a default content-type header in Magento App model

PHP will send the proper header, and setting it causes problems if
controllers send the header again.
Ensure the spam actions do not start a session.