Origin for each line in .github/mergeable.yml from check-in c1ddb4c814:

c1ddb4c814 2021-03-01 jeff@gridfini: version: 2
c1ddb4c814 2021-03-01 jeff@gridfini: mergeable:
c1ddb4c814 2021-03-01 jeff@gridfini:   - when: pull_request.opened
c1ddb4c814 2021-03-01 jeff@gridfini:     name: "Greet a contributor"
c1ddb4c814 2021-03-01 jeff@gridfini:     validate: []
c1ddb4c814 2021-03-01 jeff@gridfini:     pass:
c1ddb4c814 2021-03-01 jeff@gridfini:       - do: comment
c1ddb4c814 2021-03-01 jeff@gridfini:         payload:
c1ddb4c814 2021-03-01 jeff@gridfini:           body: >
c1ddb4c814 2021-03-01 jeff@gridfini:             Thanks for your contribution!  Unfortunately, we don't use GitHub pull requests to manage code contributions to this repository.  Instead, please contact the author via [DL2MIE](https://dl2mie.darc.de/).
c1ddb4c814 2021-03-01 jeff@gridfini:       - do: close