Trim whitespace in username

[Gregoire Detrez]

From the mailing list:

After 4 password resets, I noticed that autofill had a whitespace at the end my username.

It would be greatly appreciated if you could add a trim to the username, since I believe that whitespaces are not even legal username characters.

[Gregoire Detrez]

Strip spaces from username on login [fix #97]

→ <<cset d8c3c9a4ea6c>>