The mediawiki.skinning.content.externallinks module is deprecated.
Impacted skins should use ResourceLoaderSkinModule following the example in Monobook
If no action is taken the module will eventually be removed and styles for icons that show up against links will no longer function in the skin.
Also: https://github.com/femiwiki/FemiwikiSkin/issues/210
TODO
- Provide patches for all impacted skins
- Remove the module