A docs page that lists unsupported file systems and provides some way for users to report a new one.

Noted in SERVER-8600, this page will be linked to the user in a warning that is output when there is an error fsyncing a directory. This page should probably provide them info about the warning and what they can do to deal with it.

Note that the creation of this page is not set in stone, would love to link to an existing page or perhaps not link at all if there is a better way we could provide this information.