Finetune container-runtime-endpoint option help text

[jnummelin]

Signed-off-by: Jussi Nummelin jussi.nummelin@gmail.com

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Add a note to kubelet container-runtime-endpoint option to clearly indicate that in case of Docker being used the path points to dockershim socket created by kubelet itself. I'd guess I'm not the only one been banging their heads on this as I assumed from the flag description that I should give /var/run/docker.sock in to this option.

Which issue(s) this PR fixes:
N/A

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

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[ehashman]

/ok-to-test
/priority backlog

[ehashman]

/lgtm
/retest

[mrunalp]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jnummelin, mrunalp

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