ResourceLoaderStartUpModule::getConfigSettings(). Use this to export static
configuration variables to JavaScript. Things that depend on the current page
or request state must be added through MakeGlobalVariablesScript instead.
+Skin is made available for skin specific config.
&$vars: [ variable name => value ]
+$skin: Skin
'ResourceLoaderJqueryMsgModuleMagicWords': Called in
ResourceLoaderJqueryMsgModule to allow adding magic words for jQueryMsg.