Update haproxy
Update haproxy

Changes:

- https://github.com/docker-library/haproxy/commit/c447fe1: Update to 2.1.9
- https://github.com/docker-library/haproxy/commit/34f7b69: Update to 2.2.4
- https://github.com/docker-library/haproxy/commit/e12ed14: Update to 2.0.18

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