LDAP auth username case sensitive

[hamsterbacke]

I use the LDAP auth for login and allowed_users with the sAMAccountName.
The login is working successfull but sometimes the user can't see the scripts that it should be allowed to via allowed_users config.
I figured, that the case of the username on login is used for matching against allowed_users.
They logged in with "Bob" instead of bob and that prevents correct matching in allowd_users array.

As a quick fix I edited the file "auth/auth_ldap.py" and added .lower() in line 110:
username = request_handler.get_argument('username').lower()

I guess this case problem is affecting every login method.

[bugy]

True, thanks for reporting!

[bugy]

Fixed, now all authorization checks should be case-insensitive (for any auth provider)