Uknown key is still missing.
The doc has not been uploaded since RC, which doesn't mean that things are not already fixed in sources.
so obviosuly docs will get fixed
I insist: the doc is not broken and doesn't need to be fixed (except the minor corrections that are reported sometimes), it just doesn't match one's particular version of SFML 2 (it currently matches the RC).
If you build SFML, build the doc too (sounds quite obvious
).