I believe I understand what Terry's suggesting.

He wants to be able to be able to have a new filesystem type appear by
simply mounting (or symlinking, or copying) the implementation of a
new filesystem type into /sbin/fs/foo, and he believes that the name
of the filesystem type should be defined purely by the name used in
the /sbin/fs directory, and not by anything inherent in the binaries
found inside /sbin/fs/foo/.

so that, as an extreme case, one could do
	mv /sbin/fs/{nfs,losefs}
and 
	sed 's/nfs/losefs/' </etc/fstab >/etc/fstab.NEW && mv /etc/fstab{.NEW,}

and reboot, and everything will keep working..

						- Bill