maxCaptionLength parsedMessageAnonEditWarning userCanEdit
And as of last month, also:
These are far too generic to be exported without any prefixed relating to MediaWiki, Wikibase, or WikibaseMediaInfo. This is problematic within mw.config itself, but even more so because they also become global variables.
Probably easiest to consolidate them under a single, prefixed, key, such wgWbMediaInfo or something like that.