Merge ~d-info-e/cloud-init:fix-openstack-doc into cloud-init:master

[do3meli]

doc: Fix links in OpenStack datasource documentation.

Fix link to external openstack resource and to internal vendor data.

LP: #1721660

[Scott Moser (smoser)]

review: Approve

[Server Team CI bot (server-team-bot)]

PASSED: Continuous integration, rev:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/947/
Executed test runs:
    SUCCESS: Checkout
    SUCCESS: Unit & Style Tests
    SUCCESS: Ubuntu LTS: Build
    SUCCESS: Ubuntu LTS: Integration
    SUCCESS: MAAS Compatability Testing
    IN_PROGRESS: Declarative: Post Actions

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/947/rebuild

review: Approve (continuous-integration)

[Chad Smith (chad.smith)]

An upstream commit landed for this bug.

To view that commit see the following URL:
https://git.launchpad.net/cloud-init/commit/?id=a510726d

diff --git a/doc/rtd/topics/datasources/openstack.rst b/doc/rtd/topics/datasources/openstack.rst
index 607b70f..43592de 100644
--- a/doc/rtd/topics/datasources/openstack.rst
+++ b/doc/rtd/topics/datasources/openstack.rst
@@ -5,7 +5,7 @@ OpenStack
 
 This datasource supports reading data from the
 `OpenStack Metadata Service
-<http://docs.openstack.org/admin-guide/compute-networking-nova.html#metadata-service>`_.
+<https://docs.openstack.org/nova/latest/admin/networking-nova.html#metadata-service>`_.
 
 Configuration
 -------------
@@ -59,6 +59,6 @@ upgrade packages and install ``htop`` on all instances:
   {"cloud-init": "#cloud-config\npackage_upgrade: True\npackages:\n - htop"}
 
 For more general information about how cloud-init handles vendor data,
-including how it can be disabled by users on instances, see `Vendor Data`_.
+including how it can be disabled by users on instances, see :doc:`/topics/vendordata`.
 
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