try_login() to login users
valid_username() checks if a new username fits criteria
valid_user() checks if the user exists in the database
good_passwd() only checks for minimum password length for now.
can be later expanded to tell a user to make a stronger password.
valid_passwd() checks if the password for the specified user is correct
user_suspended() checks if the user is suspended (or not)
user_delete() deletes a user
Also: Enforce proper usernames on account creation
Fix bug where $SUPPORTED_LANGS needs to be reset on account creation
Fix bug where an account could be created with an empty passwd
Display (required) beside password fields on account creation
Enforce good_passwd() on account creation
Signed-off-by: Loui Chang <louipc.ist@gmail.com>
