Also:
- caddy's sources moved into the caddyserver namespace
- add options passthrough to the x86 override
- disable tests in general (TestVisibleErrorWithPanic fails regardless
  for whatever reason)

x86 override is not removed for whenever tests can be re-enabled.

* Broken. It uses a deprecated google charts API at:
  https://maps.googleapis.com/maps/api

* Fails to build and run with python3, no development

https://github.com/keleshev/schema
Schema is a library for validating Python data structures

Fix: CVE-2018-15664 symlink-exchange attack with directory traversal.

More release details at https://github.com/docker/docker-ce/releases/tag/v18.09.7