Manual:$wgAllowAnonymousMinor/en

From Linux Web Expert

<translate> User rights, access control and monitoring</translate>: $wgAllowAnonymousMinor
Allow anonymous users to mark changes as "minor"
<translate> Introduced in version:</translate>1.2.0
<translate> Removed in version:</translate>1.6.0
<translate> Allowed values:</translate>(boolean)
<translate> Default value:</translate>false

Details

Allow anonymous users to mark changes as "minor"

Another way to do this is adding this to LocalSettings :

$wgGroupPermissions['*']['minoredit']    = false;