Remove obsolete files, simplify JSON data mgmt

data.d/certs.disabled

data.d/dns.json

obsolete/policy.de.md

obsolete/policy.en.md

obsolete/policy.es.md

obsolete/policy.it.md

obsolete/policy.pt.md

obsolete/your_data.en.md

scripts/run-test-server.sh

scripts/update.sh

test-httpd.conf