Closes #10910

Updated to 20.2 release. Adds Alpine support to ca_certs, ntp, power_state,
and resolv_conf modules. Created apk_configure module. Improved networking
and user/group functionality.

Become package maintainer. I have signed upstream CLA and am working on
upstreaming these changes.

* Switch to cmake as per upstream.
* Linking fails without fPIC, add it to {C,CXX}FLAGS.

* Use https and clarify license.

Update tools to use /usr/bin/python3 as the interpreter.

* Fixes CVE-2020-13775, introduced in ZNC 1.8.0.

Fixes #11687

running kubeadm init returns the following error during the pre-flight checks:

$ kubeadm init
W0626 09:02:08.169552   30631 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.18.4
[preflight] Running pre-flight checks
[preflight] WARNING: Couldn't create the interface used for talking to the container runtime: crictl is required for container runtime: exec: "crictl": executable file not found in $PATH

	[ERROR FileExisting-crictl]: crictl not found in system path

This python library cannot be used without actually installing python
itself, thus this commit adds python as a run-time dependency.

See: !9223

Fixes #11648