cluster/afr: Turn on eager-lock for fd DATA transactions

Problem:
With the present implementation, eager-lock is issued for
any fd fop. eager-lock is being transferred to metadata
transactions. But the lk-owner is set to local->fd address
only for DATA transactions, but for METADATA transactions
it is frame->root. Because of this unlock on the eager-lock fails
and rebalance hangs.

Fix:
Enable eager-lock for fd DATA transactions

Change-Id: If30df7486a0b2f5e4150d3259d1261f81473ce8a
BUG: 916226
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/4588
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>
Modified validation parameters for owner-uid and owner-gid.

owner-uid and owner-gid will not receive negative values anymore.

Change-Id: I82741d3d01b29e448294b2ec093fb70d22a5c77e
BUG: 912297
Signed-off-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-on: http://review.gluster.org/4581
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>
glusterd: Added description for nfs.transport-type option in volume set help.

Change-Id: I9fe81dc1c3172158e8dd86c4fa2a04af18cb9dde
BUG: 782285
Signed-off-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-on: http://review.gluster.org/4582
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>
cluster xlators: s/-1/GF_CLIENT_PID_GSYNCD/

Change-Id: I03be3cb23684de4ab36cf2953002708466edd580
BUG: 765433
Signed-off-by: Csaba Henk <csaba@redhat.com>
Reviewed-on: http://review.gluster.org/4601
Reviewed-by: Venky Shankar <vshankar@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Merge branch 'master' into op-version-for-volumes