doc: Adds man page for ceph-disk utility.

Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
doc: Updates man page for ceph-disk utility.

Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
doc: Removes ceph-deploy usage instances from ceph-disk man page.

Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
doc: Adds man page for ceph-disk utility.

Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
doc: Updates the man page for ceph-disk utility with some changes.

Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
doc: Adds the updated man page for ceph-disk utility.

Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
Merge pull request #2995 from nilamdyuti/wip-doc-ceph-disk

doc: Adds man page for ceph-disk utility.

Reviewed-by: Loic Dachary <ldachary@redhat.com>