Manual:$wgShowLogoutConfirmation

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Miscellaneous settings: $wgShowLogoutConfirmation
Whether to display a confirmation screen during user log out.
Introduced in version:1.42.0 (Gerrit change 1011369; git #5c785086)
Removed in version:still in use
Allowed values:(boolean)
Default value:false
Warning Warning: This is a temporary feature flag.