Log info

[eluser]simshaun[/eluser]
I would add 2 columns to the users table: is_logged_in & login_time

Upon login,
- If is_logged_in = 1 & login_time is not expired (I'd have a 10 minute expire time [now() + 600]), then alert user that they are already logged in. (Failure)
- Else, set is_logged_in = 1 & set login_time to the current timestamp. (Success)