we need php-5.3 not 5.2 - check is correct but text was not

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
use better german

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
add check for optional php-curl extension

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>