User:This, that and the other

w:User:This, that and the other

Config settings with no documentation
Most of these don't need documentation yet: but just listing them here for completeness.
 * Manual:$wgConfigClass
 * Manual:$wgEnableAsyncUploads
 * Manual:$wgImgAuthUrlPathMap
 * Manual:$wgAttemptFailureEpoch