Add support to manage the internal network filesystem, aka virtual folders, of virtualbox virtual machines.
When running a linux guest in virtualbox, shared folders from the host-os can be mounted by issuing the command "mount.vboxfs [-o OPTIONS] sharename mountpoint" or "mount -t vboxfs [-o OPTIONS] sharename mountpoint" respectively.
I am getting quite fond of using webmin inside a VM to manage the VM remotely, especially when the VM has no Window-Manager installed (i.e. running a lean ubuntu server).
Note: vboxfs is only available when the virtualbox guest additions are available in the guest VM (modules "vboxadd" and "vboxfs" are being loaded).
This feature however is not available in the OSS implementation of virtualbox.