Implement 'config get <var>' for the admin socket

Signed-off-by: Wido den Hollander <wido@42on.com>
Fix whitespace indentation

Signed-off-by: Wido den Hollander <wido@42on.com>
doc: Minor tweak to the definition list style.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Updated OS support for Cuttlefish.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Fixed path typo.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Fixed hyperlink.

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Removed "and" as suggested.

fixes: #3686

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Fixed typo.

fixes: #4422

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
doc: Fixed typos.

fixes: #4932

Signed-off-by: John Wilkins <john.wilkins@inktank.com>
Merge pull request #263 from wido/config-get

Add "config get <var>" to the admin 

Reviewed-by: Sage Weil <sage@inktank.com>
doc/install/os-recs: reverse order of releases

Signed-off-by: Sage Weil <sage@inktank.com>
Merge git://github.com/ceph/ceph