Manual:$wgUseValidation

Miscellaneous settings: $wgUseValidation
Validation for print or other production versions
Introduced in version:1.4.0
Removed in version:1.6.0
Allowed values:(boolean)
Default value:false

Details edit

Validation for print or other production versions

In version 1.8.2, the feature is not in use. There is also no Special:Validation page which is supposed to be used in conjunction with this variable. There was talk of doing a review extension, but that has never been implemented.