Add metadata to all md files

docs/ansible/roles/packetbeat/index.md

docs/ansible/roles/php/index.md

docs/ansible/roles/serverdensity/index.md

docs/ansible/roles/spideroak/index.md

docs/ansible/roles/user-management/index.md

docs/ansible/roles/vpn/index.md

docs/ansible/roles/zammad/index.md

docs/ansible/wiki/attacks.md

docs/ansible/wiki/backup/backup-google.md

docs/ansible/wiki/backup/backup-spideroak.md

docs/ansible/wiki/backup/backup.md

docs/ansible/wiki/backup/introduction.md

docs/ansible/wiki/backup/restore-google.md

docs/ansible/wiki/backup/restore-spideroak.md

docs/ansible/wiki/backup/restore.md

docs/ansible/wiki/configure-crontabs.md

docs/ansible/wiki/desaster-recovery.md

docs/ansible/wiki/drupal-apache-update.md

docs/ansible/wiki/drupal-deployment.md

docs/ansible/wiki/drush-fetch-aliases.md