CI broken - lots of stages with old OpenSSL

[Hal Murray]

> Edit .gitlab-ci.yml and remove the debian-oldstable-* jobs. For Ubuntu, you
> can either remove or comment out ubuntu-latest (in a few days, when 20.04 is
> released, "ubuntu:latest" should mean 20.04 instead of 18.04). Repeat for
> .gitlab-opttest-ci.yml. 

Thanks.

Where is the doc for that stuff?

I didn't see any comments to copy.  I did find
  allow_failure: true
So I added several of those.

I pushed a first pass.  I assume it will soon tell me what I missed.



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