Fixes: bz#1665358
Change-Id: Idbf88ec3ac683733b32c313377eeb72f2819bf0d
Signed-off-by: Amar Tumballi <amarts@redhat.com>

We still use gnfs on our side, so do a little work to support
server.all-squash. Just like server.root-squash, it's also a
volume wide option. Also see bz#1285126

$ gluster volume set <VOLNAME> server.all-squash on

Note: If you enable server.root-squash and server.all-squash
at the same time, only server.all-squash works. Please refer
to following table

+---------------+-----------------+---------------------------+
|               |all_squash       | no_all_squash             |
+-------------------------------------------------------------+
|               |                 |anonuid/anongid for root   |
|root_squash    |anonuid/anongid  |useruid/usergid for no-root|
+-------------------------------------------------------------+
|no_root_squash |anonuid/anongid  |useruid/usergid            |
+-------------------------------------------------------------+

Updates bz#1285126
Signed-off-by: Xie Changlong <xiechanglong@cmss.chinamobile.com>
Signed-off-by: Xue Chuanyu <xuechuanyu@cmss.chinamobile.com>
Change-Id: Iea043318fe6e9a75fa92b396737985062a26b47e