[DOC] USE_SSL parameter is not a valid setting

[Marc Methot]

tools/find_settings.py will not list `USE_SSL` parameter and the upgrade check yields a warning
WARNING Unknown settings: USE_SSL

But this is in the docs covering configuration:
~~~
./doc/source/admin/customize-configure.rst: USE_SSL = False
./doc/source/admin/customize-configure.rst: USE_SSL = True
./doc/source/admin/customize-configure.rst: To enable HTTPS, the ``USE_SSL = True`` option is required.
~~~

This is also not a django setting.

Cheers,
Marc Methot

[Marc Methot (mb-methot)]

https://review.opendev.org/#/c/703893/

Amended my commit with the #Closes-Bug properly, but didnt link it here.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/703893
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=207ebdf27ccc8ca874e00a7c0e87de0e41967ae7
Submitter: Zuul
Branch: master

commit 207ebdf27ccc8ca874e00a7c0e87de0e41967ae7
Author: Marc Methot <email address hidden>
Date: Wed Jan 22 17:33:49 2020 -0500

    Removing USE_SSL parameter from the configuration documentation

    Change-Id: I15be80d6c02ea2cc1b8434cf930879b782360dd6
    Closes-Bug: #1860614

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 18.1.0 release.