QTMOUNT allows exportfs to detect an attempt to open a /srv file
that has been opened and mounted somewhere on the system running exportfs
(i'll refer to that as the `called system' and the client of exportfs as
the `calling system').
exportfs opens the /srv file, mounts that file descriptor
exportfs never detects this bit being set. i would expect the
type to be 90, not 80 in this example ...
; mkdir q; mount /srv/boot q; ls -qd q
(0001 48 80) q
i wouldn't! it's not set on the *mounted* file system in the scope of exportfs
but on the file (/srv/boot), once opened, that
