default.css:
- fix path to quota background image


git-svn-id: svn://svn.code.sf.net/p/postfixadmin/code/trunk@1664 a1433add-5e2c-0410-b055-b7f2511e0802
login.php, users/login.php:
- trim() $fUsername - MySQL thinks "foo" == "foo  " (and therefore allows
  login as "foo@example.com " - but later we'll get funny "undefined index"
  problems in PFAHander->view()) when an admin wants to change the password


git-svn-id: svn://svn.code.sf.net/p/postfixadmin/code/trunk@1665 a1433add-5e2c-0410-b055-b7f2511e0802