[WIP] Fix #714 - Switch to (mainly) sslyze for TLS testing #1312

Job	Run time
build-docker (internet.nl, docker/Dockerfile, app)	6m 30s
build-docker (unbound, docker/Dockerfile, unbound)	30s
build-docker (linttest, docker/Dockerfile, linttest)	7m 30s
build-docker (test-runner, docker/test-runner.Dockerfile)	32s
build-docker (webserver, docker/webserver.Dockerfile)	28s
build-docker (grafana, docker/grafana.Dockerfile)	30s
build-docker (cron, docker/cron.Dockerfile)	31s
docs	1s
lint/check	52s
development-environment-test	1m 47s
batch-integration-test	2m 28s
integration-test	3m 36s
test	2m 18s
	27m 33s

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