Don't let people create new EncFS vaults
EncFS is effectively EOL and has multiple known security issues, and its author recommends using GoCryptFS[2]. Let's maintain support for existing EncFS vaults, but prevent people from creating new ones; only CryFS and GoCryptFS will be supported going forward.
[2] https://github.com/vgough/encfs/issues/314#issuecomment-325095995