[dev] Login with capitalized email

[Gonçalo Queirós]

Hi there list.
I don't know if this is the intended behavior, but if i have a user with
email (example at example.com) and he logs in with (EXAMPLE at example.com),
for Horde they are different users, so new prefs will be created etc..Is
this the intended behavior? If it's the expected behavior, using the
preauthenticate hook to return  strtolower($userId) is the correct way
to fix this?
Thanks.
-- 
Gonçalo Queirós
Eng. Software
*m.* 913918777

*Portugalmail* | plataformas de inovação
*w.* http://www.portugalmail.net