Manual:$wgShowHostnames/en

From Linux Web Expert

<translate> Debug</translate>: $wgShowHostnames
If set to true, exposes host names through API and HTML comments.
<translate> Introduced in version:</translate>1.11.0
<translate> Removed in version:</translate><translate> still in use</translate>
<translate> Allowed values:</translate>(boolean)
<translate> Default value:</translate>false

Details

If set to true, exposes host names through API and HTML comments.