I missed the LMS production settings, and Studio in its entirety.

Currently, the LMS logout endpoint should iframe in the logout pages of
all the IDAs you were logged into. In short, this was made possible with
DOP because keeping track of the logout URIs and leaving a trail of
evidence in the user cookies was part of what we added in our fork of
DOP.  In the case of DOT, we don't have time or desire to fork DOT to
mirror this behavior, so our stop-gap solution is to log out the user
from a list of logout URIs in settings.

This is a feature that has been deprecated and can be safely removed.

DEPR-7

Populate experiment data with holdback key post enrollment and check holdback key when setting user group

Add a facility for building stacked configuration models that control the same configuration on a Global, Site, Org and Course level

Content Type Gating: Xblocks that have a graded component cannot be
accessed by audit track users.
  - Caveats:
    - In studio, instructors can set certain xblocks to be available to
      all users, but graded components will default to not being
      available for audit users
    - If a course does not have a verified mode option, all users will
      have access to graded content.

The Waffle Flag: The waffle flag is of for now.
  It's name is: ```content_type_gating.debug```

This Commit Does NOT Include: Displaying for a user WHY they do not have
access to a specific piece of content.  That change will be part of
another PR.

relied on the old configuration values and old way of validating
passwords. Also improved registration page by always showing error
messages rather than hiding them on leaving the field.

From edx-drf-extensions:
1. EnsureJWTAuthSettingsMiddleware: Ensures proper JWT auth settings
   for endpoints.
2. JwtAuthCookieMiddleware: Combines the JWT auth cookie parts into a
   JWT auth cookie.

ARCH-233

This upgrades DOT by reverting the revert.

This reverts commit 4d8b9c36

ARCH-180

ARCH-223

ARCH-220

ARCH-193

Use StreamingHttpResponse to support larger file downloads

- Change retire mailings endpoint to use new USER_RETIRE_THIRD_PARTY_MAILINGS signal, currently only used by Sailthru retirement
- Move USER_RETIRE_MAILINGS signal firing to the LMS misc endpoint
- Remove duplicate clearing of UserOrgTags
- Remove LMS imports in openedx/core and update usage to use new USER_RETIRE_LMS_CRITICAL and USER_RETIRE_LMS_MISC signals
- Add testing for new signal handlers and app registration for the LMS survey app

It is always on now, and this is just a deprecated stub which will be
removed in Django 2.0.