mtr processes keep remaining as zombies

[sotn3m]

Hi,
I was experiencing significant amount of zombie processes. These were all mtr processes under telegraf.

My proposal:
sotn3m@d292f77

This has solved problems in my environment.

I have read somewhere that using init: true is a good practice, so presumably this can be left as is even when telegraf/mtr start working correctly.

[fmdlc]

Hi! Thank you! I will take a look and keep you posted. Probably you're right about this!.

[aidabeorn]

Tested your fix on my pi, and it resolved the issue, should PR the changes 👍

[villasenor]

To solve this in Kubernetes, we'll need to manually change the entrypoint for the container build to use tini or something though. The existing PR does take care of the docker-compose case, but we could fix this for everyone in one change by fixing the image.