...
Further testing due to CRM-21297 has uncovered that if wp is in its own directory AND the content directory has been moved there is an issue with ckeditor. https://github.com/civicrm/civicrm-core/blob/master/CRM/Core/Resources.php#L737 uses `"[civicrm.root]` " and does not find the new settings via civicrm.settings.php. https://github.com/civicrm/civicrm-core/blob/master/CRM/Admin/Page/CKEditorConfig.php#L273 uses `"[civicrm.files]` " and this also does not find the overridden settings.
...