* Docs: update CONTRIBUTING.md

* Docs: clean up outdated roadmap and point to github issues instead

* Docs: update note on kubelet_cgroup_driver

* Docs: update kata containers docs with note about cgroup driver

* Docs: note about CI specific overrides

This replaces master with "control plane" in Kubespray docs
because of [1].

[1]: https://github.com/kubernetes/enhancements/blob/master/keps/sig-cluster-lifecycle/kubeadm/2067-rename-master-label-taint/README.md#motivation

* Packet->Equinix Metal rename #6901 

Updates throughout to reflect #6901 renaming for Packet to Equinix Metal.

* Rename Packet to Equinix Metal throughout the project #6901

Packet is renamed to Equinix Metal in more contexts including
documentation links. The Terraform provider used is still the Packet
provider. The environment variables and configuration options still
refer to the Packet name.

Signed-off-by: Marques Johansson <mjohansson@equinix.com>

Co-authored-by: Edward Vielmetti <ed@packet.net>

The official word is OpenStack, not Openstack as [1].
This replaces it with OpenStack in the docs.

[1]: https://www.openstack.org/

Signed-off-by: Yongxin Li <yxli@alauda.io>

* Revert "Debian jessie docs (#1806)"

This reverts commit d78577c8.

* Revert "[contrib/network-storage/glusterfs] adds service for glusterfs endpoint (#1800)"

This reverts commit 5fb6b2ea.

* Revert "[contrib/network-storage/glusterfs] bootstrap for glusterfs nodes (#1799)"

This reverts commit 404caa11.

* Revert "Fixed kubelet standard log environment (#1780)"

This reverts commit b8384685.

* Revert "Add support for fedora atomic host (#1779)"

This reverts commit f2235be1.

* Revert "Update network-plugins to use portmap plugin (#1763)"

This reverts commit 6ec45b10.

* Revert "Update roadmap (#1795)"

This reverts commit d9879d80.

Non-brekable space is 0xc2 0xa0 byte sequence in UTF-8.

To find one:

    $ git grep -I -P '\xc2\xa0'

To replace with regular space:

    $ git grep -l -I -P '\xc2\xa0' | xargs sed -i 's/\xc2\xa0/ /g'

This commit doesn't include changes that will overlap with commit f1c59a91.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>