Changed behavior of the entire database selection process. A real "upgrade"/"don't touch the database" option was added, and the old options unconditionally delete the database.

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<?php

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$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

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for ( $i = 0; $i < 8; $i++ )

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  echo $chars{ rand(0, strlen($chars)-1) };