doc: Fixes a typo in ceph-deploy man page.

Lack of a single space was restricting the proper rendering of an option in
html. Fixes the error.

Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
doc: Adds updated ceph-deploy man page under man/

Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
Merge pull request #3227 from nilamdyuti/wip-doc-ceph-deploy

Fixes a typo in ceph-deploy man page

Reviewed-by: Loic Dachary <ldachary@redhat.com>