Manual:$wgRightsUrl

Details
Set this to specify an external URL containing details about the content license used on your wiki.

It's set at install time by the installer, either from its own predefined list or from the data returned from the Creative Commons license chooser.

If   is set then this setting is ignored.

This setting is used in several places, most notably to automatically generate the footer (see   for details) and in meta>Special:MyLanguage/API:Meta|API:Meta output.

In MediaWiki 1.8.2, it appears that   governs portions of the Creative Commons metadata generated within   in file   regardless of whether   is set or not.

Licenses
Some available URLs are listed in the URL column of this table: