Remove cassrv option references.
Move logout and lockdown options to separate option groups.

Submitting one option was resetting the value of the other since they were in the same option group.
Fix menu title typo
Add /wp-admin/ path to lockdown "whitelist"

Useful for plugins that communicate with external servers via a POST to /wp-admin/, such as InfiniteWP.
Change ticket param name from 'casticket' to 'ticket'

Implementation differences between IU and TAMU CAS
Fix validation URL typo