Manual:$wgExtendedLoginCookieExpiration/es

Detalles
The purpose of this cookie is to allow having a different (usually longer, but this is not enforced) duration for "" login-related cookies. This means you can e.g. set the standard cookie duration (widely used for MW cookies) to 30 days, but set the "" duration to a year.

Los valores significan:
 * null - MW Seguirá en cambio.
 * Entero positivo - Duración de "" sesiones, en segundos.
 * 0 - "" las sesiones durarán hasta el cierre del navegador.