why default variables are set to nil in emacs24

[Thierry Volpiatto]

Hi Michael,
i wonder why between others,
tramp-default-user-alist, and tramp-default-method-alist are set to nil
in emacs24.
That break my anything-find-files when i want to use 
/hostname:
When i set these variables like in emacs-23 branch, all work fine.
(or if i use emacs23)
So i guess these variables are set in some way in find-file or somewhere
because in emacs -Q, C-x C-f /hostname: work as expected.
It would be nice for third party packages that a default value is given
like in emacs23.
So for the moment i have to let-bound these variables in my main
function :-;

-- 
A+ Thierry
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