Tests needed: user.module

This information is from the code coverage report (see http://coverage.cwgordon.com/coverage).

We need to test:

1) Loading users from various services (hook_info + hook_auth)
2) Changing a user's roles
3) Deleting a blocked user's session
4) Submitting a username with an invalid character
5) User searching
6) All the user blocks
7) Updating users from the old to the new hashing algorithm
8) Permissions, roles, multiple roles, etc.
9) Signatures
10) All user actions.