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

[Florian Weimer]

* Francesco Poli:

>> Probably, you should use the SQLite database directly,
>> instead of parsing web pages.
>
> Well, have I (remote) access to the SQLite database?!?

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