revert r103396 (breaks unit tests) - In lots of these places $u is undefined (for...

revert r103396 (breaks unit tests) - In lots of these places $u is undefined (for example, of a user doesn't specify a name, we havn't created a user object yet at the time of that check). Probably need to do something like create a second hook for loginAuditUserTotallyFailed or something.