upstart/ceph-hotplug: tell activate to start via upstart

This will mark the OSD data dir as upstart-managed.

Signed-off-by: Sage Weil <sage@inktank.com>
upstart: ceph-hotplug -> ceph-osd-activate

This is a more meaningful name.

Signed-off-by: Sage Weil <sage@inktank.com>
ceph-disk-activate: add --mark-init INITSYSTEM option

Do not assume we will manage via upstart; let that be passed down via the
command line.

Signed-off-by: Sage Weil <sage@inktank.com>
ceph-disk-activate: add --dir DIR option

Instantiate and symlink a dir into place.

Signed-off-by: Sage Weil <sage@inktank.com>
init-ceph: fix local vs conf iteration

Populate $local only if get_local_name_list() is called.  init-ceph does
this, but mkcephfs does not, which is good.

Fix the behavior when a type or name is passed as an argument so that both
the conf and local daemons are checked.

Signed-off-by: Sage Weil <sage@inktank.com>