doc: dev: cache-pool.rst: fix typo s/objets/objects/

Signed-off-by: Joao Eduardo Luis <joao.luis@inktank.com>
mon: OSDMonitor: 'osd pool' - if we can set it, we must be able to get it

Add support to get the values for the following variables:
 - target_max_objects
 - target_max_bytes
 - cache_target_dirty_ratio
 - cache_target_full_ratio
 - cache_min_flush_age
 - cache_min_evict_age

Signed-off-by: Joao Eduardo Luis <joao.luis@inktank.com>
Merge pull request #2046 from ceph/wip-8670

mon: OSDMonitor: 'osd pool' - if we can set it, we must be able to get it

Reviewed-by: Loic Dachary <loic@dachary.org>
Reviewed-by: Sage Weil <sage@redhat.com>