Porting fixes to #2792 and #2798 to v0.37

[iwankgb]

Porting of recent fixes applied to master.

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[iwankgb]

@Creatone can you add a comment in this PR too, please?

[Creatone]

@googlebot I consent.

[bobbypage]

LGTM, thanks to both of you for the fixes!

[bobbypage]

https://github.com/google/cadvisor/releases/tag/v0.37.5 has been cut with this included.