Update k8s to v1.16.6

Bump kine/k8s to fix broken label based pagination

Since generated cert/keys are stored locally, each server has a different
copy.  In a HA setup we need to ensure we download the cert and key from
the same server so we combined HTTP requests to do that.

Bump k8s to v1.16.3-k3s.1

Fix broken K3S_TOKEN env

📰 Modify BUILDING description

Revert check-config's "Silence modprobe warnings"

This reverts commit 8edbe30c.

Signed-off-by: William Zhang <zhang.wanmin@zte.com.cn>

Ensure that revision is consistent for empty lists

Add new BUILDING.md with "Building from Source" content from k3s docs

Non-fatal warning for check-config modules

Kubernetes componentstatus check is hardcoded to 10252 and 10251
so we should never change these ports.  If you do componentstatus
will return error.

Add the --with-node-id flag to agent

Search system path for iptables in check-config

Add check-config for system validation

Update kine/dynamiclistener