Fixes server update compatibility-mode issues

* `compatibility-mode` is now only sent to API when switch given. Had
  been defaulting to `false`
* Switch is now negatable with `--no-compatibility-mode`
* Short code of "c" is ambiguous with global config short code
* Args example name brought inline with other commands
Exposes server's `compatibility_mode` in details
Exposes server's arch (via image) in details

Had been missed from field list so never appeared