Versioning file server

Question

Looking for a virtual filesystem server (like ftp or sshd or NFS, samba) with the following features:

• open-source
• cross platform server (Linux/Windows/OSX)
• linear file versioning (don't need to have branches) - but done transparently, simple, on the save create a new version
• ability access to the earlier version with some file-name-semantic (like file.jpg;ver:3 or so)
• support for some level of ACL / permissions

Exists something like?

Answer 1

I think WebDAV fits the description. Just not sure about the ACLs here. This may require some additional effort from the web server.