Manual:$wgUseLinkNamespaceDBFields

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Miscellaneous settings: $wgUseLinkNamespaceDBFields
Enable use of the *_namespace fields of the pagelinks, redirect, and templatelinks tables.
Introduced in version:1.24.0 (Gerrit change 153634; git #c202712d)
Removed in version:1.27.0 (Gerrit change 242209; git #26bcbd06)
Allowed values:(boolean)
Default value:true