* (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
* (T196092) Hide MySQL binary/utf-8 charset option in the installer.
* (T196185) Don't allow setting $wgDBmysql5 in the installer.
* (T195783) Initialize PSR-4 namespaces at same stage as normal autoloader.
* (T196092) Hide MySQL binary/utf-8 charset option in the installer.
* (T196185) Don't allow setting $wgDBmysql5 in the installer.