* Fixes:
- fixed missing variable $port (MySQL: 3306)
- "imported" mysqli class
Signed-off-by: Roland Häder <roland@mxchange.org>
* Fixed:
- better use `false` and `$port > 0`
* And better only provide `$port` when larger zero.
* Initialize `$port` with zero value (int) and not `false` (bool).
* Removed duplicate mysqli "import".
* `$post_update` is no longer used. Instead `$prefix` needs to be checked.
