Some user backends (like the database backend) allow us to obtain a user
case insensitive. However the UID itself is case sensitive.
Example:
* create a user User1
* login as User1
- This results the data/User1 folder to be created etc
* now have some code somewhere that obtains the userFolder (from
IRootFolder) but pas in 'uSER1' as uid
- The code will check if that is a valid user. And in this case it is
since User1 and uSER1 both map to the same user
- However the the UID in the user object is used for the folder a new
folder fill be create data/uSER1
With this PR this is avoided now. Since we obtain the real UID casing in
the backend before creating the user object.
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
On some backends (saml for example) users can't revalidate their
passwords as Nextcloud has no way to do verify it.
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
