PHP 4 style constructors not compatible with PHP 7+

```
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Database has a deprecated constructor in /home3/.../inc/database.php on line 2

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; PasswordHash has a deprecated constructor in /home3/.../inc/PasswordHash.php on line 27
```