Fix the docker language when using podman

[swick]

Two changes:

• fix for the podman system info invocation which is required to have podman work when aliased to docker
• fallback from docker to podman for when podman is not aliased to docker (default on many distros)

[asottile]

generally I just symlink an alternative container runtime to docker

[swick]

You did not even take the time to read the comment.

[asottile]

you did not even take the time to search the issue tracker

[swick]

I certainly did, but you still didn't read it. Please take the 10 seconds it takes to actually read the 3 sentences I wrote. Literally less time than typing out a comment.

[asottile]

I did read it. and I read the whole changeset

and there are duplicates already discussing and denying what you changed

[swick]

I read the whole changeset

That is literally not true.

[asottile]

promise I did. good day