The settings
module provides an easy to use key/value-storage.
pages.availableRoutes
pages.availableViews
pages.availableGlobalRoutes
widgets.availablePhpClasses
backend.adminltes.skin
registerPrototypeAssetKey
registerPatchAssetKey
<markdocs>.markdownUrl
<markdocs>.forkUrl
<markdocs>.defaultIndexFile
<markdocs>.cachingTime
<markdocs>.htmlUrl