1) Fix the typo in NFS default ACL
   The typo was introduced as part of the Fix to BZ 1009210 i.e.
   http://review.gluster.org/5980. The user ACL xattr structure
   was passed to default ACL xattr.

2) Clean up NFS code to avoid unnecessary SEGV in
   rpcsvc_drc_reconfigure() which was not validating the
   svc->drc. Add a routine rpcsvc_drc_deinit() to handle
   the clean up of DRC specific data structures. For init(),
   use rpcsvc_drc_init().

3) nfs_init_state() was returning wrong value even if the
   registration with portmapper failed, causing the NFS
   server process to hang around. As a result it used to
   get SEGV during rpcsvc_drc_reconfigure().

4) Clean up memfactor usage across nfs.c nfs3.c.

Change-Id: I5cea26cb68dd8a822ec0ae104952f67fe63fa703
BUG: 1009210
Signed-off-by: Santosh Kumar Pradhan <spradhan@redhat.com>
Reviewed-on: http://review.gluster.org/6329
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

Implement reconfigure() for NFS xlator so that volume set/reset wont
restart the NFS server process. But few options can not be reconfigured
dynamically e.g. nfs.mem-factor, nfs.port etc which needs NFS to be
restarted.

Change-Id: Ic586fd55b7933c0a3175708d8c41ed0475d74a1c
BUG: 1027409
Signed-off-by: Santosh Kumar Pradhan <spradhan@redhat.com>
Reviewed-on: http://review.gluster.org/6236
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>

Duplicate request cache provides a mechanism for detecting
duplicate rpc requests from clients. DRC caches replies
and on duplicate requests, sends the cached reply instead of
re-processing the request.

Change-Id: I3d62a6c4aa86c92bf61f1038ca62a1a46bf1c303
BUG: 847624
Signed-off-by: Rajesh Amaravathi <rajesh@redhat.com>
Reviewed-on: http://review.gluster.org/4049
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>