[Secure-testing-team] Updates for testing-security track page

[Florian Weimer]

* Francesco Poli:

>> Not remote, but you should be able to build one with a couple of
>> "make" invocations.  Something like this:
>> 
>>   make update-packages update-testing-security update-volatile all
>
> Mmmh, I don't quite understand: I don't think I can login onto the
> machine where the SQLite database lives.

You just check out the secure-testing repository.  The scripts to
download the package files from the archive mirrors are contained in
it.  They use only open interfaces which are accessible to everyone.