This patch takes care of changing admin guide (admin_managing_volumes.md) for remove-brick usage change. 3.6 version onwards remove-brick requires an explicit option (start/force etc). Change-Id: If6c5b0bf2c30c2b9a8c7644d314e2593006818c2 BUG: 1086737 Signed-off-by: Atin Mukherjee <amukherj@redhat.com> Reviewed-on: http://review.gluster.org/7474 Reviewed-by: Lalatendu Mohanty <lmohanty@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Vijay Bellur <vbellur@redhat.com>