[Feature Request] `.rsync-filter` support in reverse mode

[xax]

cppcryptfs (and gocryptfs) are great. It's the reverse mode, that differentiates ist from other solutions.

My use case of reverse mode is a backup workflow: Provide an encrypted view of a data structure by means of cppcryptfs, sync it into cloud storage using an ssh-access and rsync.

rsync can use global and folder-wise filter files; using standard command line "-F", rsync reads files called .rsync-filter as folder scoped filter files.

Wouldn't it be a useful addition to cppcrypt's functionality to filter using rsync's filter syntax and files in providing the encrypted view? That way rsync would be able to act on virtually the same files encrypted, as it would do without the gocryptfs layer.