On my local setup, I have wgDBservers configured, but after updating from 1.35.2 to 1.36.0, this setting appears to be no longer used by mw-config, and the connection to the database fails as a result. Doing some println debugging shows that when mw-config goes to connect to the database, it is using the default database settings, which I have not overridden in LocalSettings.php. The settings in wgDBservers do appear to be in scope at that time (via $this->getVar('wgDBservers')). Issue is still present in 1.36.1. Workaround is to use maintenance/update.php instead.

List of steps to reproduce (step by step, including full links if applicable):

• Use wgDBservers to configure the database in a 1.35.2 installation. Here is my redacted configuration:

$wgDBservers = [
  [
    'host' => "[REDACTED]",
    'dbname' => "[REDACTED]",
    'user' => "[REDACTED]",
    'password' => "[REDACTED]",
    'type' => "mysql",
    'flags' => DBO_SSL,
    'load' => 1,
    'sslCAFile' => "[REDACTED]",
  ],
];

• Update to 1.36.0.
• Use mw-config (browser-based installer) to finish the update.

What happens?:

Installer is unable to connect to the database:

An error was encountered when connecting to the database using the settings specified in LocalSettings.php. Please fix these settings and try again. Cannot access the database: :real_connect(): (HY000/2002): No such file or directory

What should have happened instead?:

Installer should have been able to connect to the database.

Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc: