Optimize the link address

Use https instead of http to ensure the safety without containing our
account/password information

Change-Id: I0ffb9e2270bbae844c187fdc17610e7805553d66

CONTRIBUTING.rst

@@ -1,13 +1,13 @@
 If you would like to contribute to the development of OpenStack,
 you must follow the steps in this page:
 
-   http://docs.openstack.org/infra/manual/developers.html
+   https://docs.openstack.org/infra/manual/developers.html
 
 Once those steps have been completed, changes to OpenStack
 should be submitted for review via the Gerrit tool, following
 the workflow documented at:
 
-   http://docs.openstack.org/infra/manual/developers.html#development-workflow
+   https://docs.openstack.org/infra/manual/developers.html#development-workflow
 
 Pull requests submitted through GitHub will be ignored.
 

HACKING.rst

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

README.rst

@@ -2,8 +2,8 @@
 Team and repository tags
 ========================
 
-.. image:: http://governance.openstack.org/badges/oslo.messaging.svg
-    :target: http://governance.openstack.org/reference/tags/index.html
+.. image:: https://governance.openstack.org/badges/oslo.messaging.svg
+    :target: https://governance.openstack.org/reference/tags/index.html
 
 .. Change things from this point on
 
@@ -22,6 +22,6 @@ The Oslo messaging API supports RPC and notifications over a number of
 different messaging transports.
 
 * License: Apache License, Version 2.0
-* Documentation: http://docs.openstack.org/developer/oslo.messaging
-* Source: http://git.openstack.org/cgit/openstack/oslo.messaging
-* Bugs: http://bugs.launchpad.net/oslo.messaging
+* Documentation: https://docs.openstack.org/developer/oslo.messaging
+* Source: https://git.openstack.org/cgit/openstack/oslo.messaging
+* Bugs: https://bugs.launchpad.net/oslo.messaging