Automatically add a small popup (see Extension:PagePopups) link at the right of links of certain namespaces.

Normal namespaces are mapped to popup namespaces with $wgNamespacePopupsNamespaceMap configuration variable.

See https://www.mediawiki.org/wiki/Extension:NamespacePopups for detailed help.

cd extensions
git clone https://gerrit.wikimedia.org/r/p/mediawiki/extensions/NamespacePopups.git