[docs]: fix broken links

[holmanb]

Documentation request

The docs reference various pages and anchors that are no longer reachable. These should be fixed. Run tox -e linkcheck to see the failures.

$ tox -e linkcheck | grep broken
(reference/yaml_examples/chef: line  114) broken    http://apt.opscode.com/[email protected] - 403 Client Error: Forbidden for url: http://apt.opscode.com/[email protected]
(reference/datasources/opennebula: line   77) broken    http://opennebula.org/documentation:documentation:cong#network_configuration - 404 Client Error: Not Found for url: https://archives.opennebula.org/documentation:documentation:cong
(reference/datasources/ec2: line   46) broken    https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Using_Tags.html#work-with-tags-in-IMDS - Anchor 'work-with-tags-in-IMDS' not found
(reference/datasources/cloudstack: line    6) broken    https://docs.cloudstack.apache.org/en/latest/adminguide/virtual_machines.html#user-data-and-meta-data - Anchor 'user-data-and-meta-data' not found
(reference/datasources/vmware: line   24) broken    https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-vm-administration/GUID-EB5F090E-723C-4470-B640-50B35D1EC016.html#GUID-9A5093A5-C54F-4502-941B-3F9C0F573A39__GUID-40C60643-A2EB-4B05-8927-B51AF7A6CC5E - Anchor 'GUID-9A5093A5-C54F-4502-941B-3F9C0F573A39__GUID-40C60643-A2EB-4B05-8927-B51AF7A6CC5E' not found
(    tutorial/lxd: line   27) broken    https://documentation.ubuntu.com/lxd/en/latest/installing/#other-installation-options - Anchor 'other-installation-options' not found
(reference/network-config: line  149) broken    https://eng.joyent.com/mdata/datadict.html - HTTPSConnectionPool(host='eng.joyent.com', port=443): Max retries exceeded with url: /mdata/datadict.html (Caused by NameResolutionError("<urllib3.connection.HTTPSConnection object at 0x74cff074d450>: Failed to resolve 'eng.joyent.com' ([Errno -2] Name or service not known)"))
(development/integration_tests: line  329) broken    https://github.com/canonical/pycloudlib/blob/1!10.0.0/pycloudlib/cloud.py#L28 - Anchor 'L28' not found
(reference/datasources/akamai: line    6) broken    https://linode.com - 403 Client Error: Forbidden for url: https://linode.com/
(           index: line   78) broken    https://matrix.to/#/#cloud-init:ubuntu.com - Anchor '/#cloud-init:ubuntu.com' not found
(reference/datasources/altcloud: line    6) broken    https://www.redhat.com/virtualization/rhev/desktop/rhevm/ - 404 Client Error: Not Found for url: https://www.redhat.com/virtualization/rhev/desktop/rhevm/
(reference/datasources/altcloud: line    6) broken    https://www.vmware.com/products/datacenter-virtualization/vsphere/overview.html - 404 Client Error: Not Found for url: https://www.vmware.com/products/datacenter-virtualization/vsphere/overview.html
(reference/datasources/vmware: line  121) broken    https://vdc-repo.vmware.com/vmwb-repository/dcr-public/723e7f8b-4f21-448b-a830-5f22fd931b01/5a8257bd-7f41-4423-9a73-03307535bd42/doc/vim.vm.ConfigInfo.html - 522 Server Error:  for url: https://vdc-repo.vmware.com/vmwb-repository/dcr-public/723e7f8b-4f21-448b-a830-5f22fd931b01/5a8257bd-7f41-4423-9a73-03307535bd42/doc/vim.vm.ConfigInfo.html

[Danielchinasa]

Hi, I want to work on this