Fix wrong major and minor numbers in gpfs FSAL.

Signed-off-by: Srikrishan Malik <srimalik@in.ibm.com>
When returning list of available exports, don't add the exports which are not available for the list requesting clien
e.g. showmount -e <server-ip> is run from client1, then shows list of exports which client1 has access to.

Signed-off-by: suhrud <supatank@in.ibm.com>
Add support to register/activate a custom facility

Signed-off-by: Poornima Gupte <poornima.gupte@in.ibm.com>