glusterd/geo-rep: more glusterd and cli fixes for geo-rep.

    -> handle option validation cases in reset case.
    -> Creating valid conf path when glusterd restarts.
    -> Reading the gsyncd worker thread status and displaying it.
    -> Displaying status-detail per worker.
    -> Fetch checkpoint info in geo-rep status.
    -> use-tarssh value validation added.

misc: misc geo-rep fixes based on cluster, logrotate etc..
    -> cluster/dht: fix 'stime' getxattr getting overwritten.
    -> cluster/afr: return max of 'stime' values in subvol.
    -> geo-rep-logrotate: Sending SIGHUP to geo-rep auxiliary.
    -> cluster/dht: fix convoluted logic while aggregating.
    -> cluster/*: fix 'stime' min/max fetch logic.

Change-Id: I811acea0bbd6194797a3e55d89295d1ea021ac85
BUG: 1036552
Signed-off-by: Ajeet Jha <ajha@redhat.com>
Reviewed-on: http://review.gluster.org/6405
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@gmail.com>
Reviewed-by: Anand Avati <avati@redhat.com>