Prevent outputting JUpdater notices and other possible junk

I got JUpdater notices outputted before our data. This fixes it.
`[\s\S]*` is btw the Javascript `.*` modifier which also matches new lines.

When finding updates at our Cpanel, JUdpater btw fetches *all* updates of the update sites. But that's a different story and probably not fixable by our code. It's not such a big deal.