Merge pull request #6768 from marcan/cython

pybind: port the rbd bindings to Cython

Reviewed-by: Josh Durgin <jdurgin@redhat.com>
Reviewed-by: Nathan Cutler <ncutler@suse.com>
Reviewed-by: Ken Dreyer <kdreyer@redhat.com>
Reviewed-by: Alfredo Deza <adeza@redhat.com>

diff --cc ceph.spec.in
Simple merge

diff --cc configure.ac
Simple merge

diff --cc debian/control
Simple merge

diff --cc src/.gitignore
Simple merge