Update documentation URLs

Update URLs according to OpenStack document migration
BTW: Do some optimization as well (http -> https)

Change-Id: Id18a381d6ecf1208e7233d39212dfb8ed02cecd0

HACKING.rst

@@ -1,4 +1,4 @@
 python-freezerclient Style Commandments
 =======================================
 
-Read the OpenStack Style Commandments https://docs.openstack.org/developer/hacking/
+Read the OpenStack Style Commandments https://docs.openstack.org/hacking/latest/

README.rst

@@ -21,7 +21,7 @@ Python bindings to the OpenStack Backup/Restore API (Freezer)
 
 This is a client library for Freezer built on the OpenStack Disaster Recovery API. It provides a Python API (the freezerclient module) and a command-line tool (freezer). This library fully supports the v1 Disaster Recovery API.
 
-Development takes place via the usual OpenStack processes as outlined in the `developer guide <http://docs.openstack.org/infra/manual/developers.html>`_.  The master repository is in `Git <https://git.openstack.org/cgit/openstack/python-freezerclient>`_.
+Development takes place via the usual OpenStack processes as outlined in the `developer guide <https://docs.openstack.org/infra/manual/developers.html>`_.  The master repository is in `Git <https://git.openstack.org/cgit/openstack/python-freezerclient>`_.
 
 
 * License: Apache License, Version 2.0