Remove mirrors related code (in rather non-risky, not so intrusive way)

I tried to keep backwards compatibility where it seemed to make sense
(e.g. the API endpoint) or the script that m

Remove mirrors related code (in rather non-risky, not so intrusive way)

I tried to keep backwards compatibility where it seemed to make sense
(e.g. the API endpoint) or the script that might still be called
somehow. Hopefully I didn't break anything but if I did feel free
to point it at me and sorry in advance :/

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Refactor long array() syntax to short []

Since app is using PHP 5.4+ already, the longer `array()` syntax can be
refactored to shorter `[]`.

Initialize the return array

New newssystem

Have the links relative/to/the/current/mirror rather than pointing to www.php.net (nuno)

Pregenerate conference teaser array