[sork] [passwd] small patch regarding username with an @

[Matthias Blaser]

hi,

when using the password module with a username containing an @, the username 
for changing the password will not be initialized correctly, cause all text 
after the first @ will be removed...

this small patch [1] fixes this --> only the text after the _last_ @ will be 
removed.

cya,
matthias

[1] http://support.adfinis.ch/passwd/main.php.diff